Nvidia's RTX Remix is a remarkable tool that allows game modders to bring state-of-the-art path traced visuals to classic PC games. We've seen Portal RTX from Nvidia already, along with the development of a full-on remaster of Half-Life 2 - but I was excited to see a community of modders take on 2004's Painkiller, enhanced now to become Painkiller RTX. It's still a work-in-progress project as of version 0.1.6, but what I've seen so far is still highly impressive - and if you have the means, I recommend checking it out. The whole reason RTX Remix works with the original Painkiller is due to its custom rendering technology, known as the PainEngine. This 2004 release from People Can Fly Studios was built around Direct X 8.1, which gave it stellar visuals at the time, including bloom effects – specular lighting with limited bump mapping and full framebuffer distortion effects. Those visuals dazzled top-end GPU owners of the time, but like a great number of PC releases from that era, it had a DX7 fallback which culled the fancier shading effects and could even run on GPUs like the original GeForce. RTX Remix uses the fixed function DX7 path and replaces the core rendering with the path tracer - and that is how I have been playing the game these last few days, taking in the sights and sounds of Painkiller with a new lick of paint. It's an upgrade that has made me appreciate it all the more now in 2025 as it is quite a special game that history has mostly forgotten. To fully enjoy the modders' work on the path-traced upgrade to Painkiller, we highly recommend this video.Watch on YouTube Painkiller is primarily a singleplayer first-person shooter that bucked the trends of the time period. After Half-Life and Halo: Combat Evolved, many first person shooters trended towards a more grounded and storytelling-based design. The classic FPS franchises like Quake or Unreal had gone on to become wholly focused on multiplayer, or else transitioned to the storytelling route - like Doom 3, for example. Painkiller took all of those 'modern' trappings and threw them in the garbage. A narrative only exists in a loose sense with pre-rendered video that bookends the game’s chapters, acting only as a flimsy excuse to send the player to visually distinct levels that have no thematic linking beyond pointing you towards enemies that you should dispatch with a variety of weapons. The basic gameplay sounds familiar if you ever played Doom Eternal or Doom 2016. It is simple on paper, but thanks to the enemy and level variety and the brilliant weaponry, it does not get tiring. The game enhanced its traditional FPS gameplay with an extensive use of Havok physics – where a great deal of the game’s environmental objects could be broken up into tiny pieces with rigid body movement on all the little fragments, or environmental objects could be manipulated with ragdoll or rope physics. Sometimes it is there for purely visual entertainment but other times it has a gameplay purpose with destructible objects often containing valuable resources or being useful as a physics weapon against the game's enemies. So, what's the score with Painkiller RTX? Well, the original's baked lighting featured hardly any moving lights and no real-time perspective-correct shadows - so all of that is added as part and parcel of the path-traced visuals. The RTX renderer also takes advantage of ray-traced fog volumes, showing shadows in the fog in the areas where light is obscured. Another aspect you might notice is that the game’s various pickups have been now made to be light-emissive. In the original game, emissives textures are used to keep things full bright even in darkness, but they themselves emit no light. Since the path tracer fully supports emissive lighting from any arbitrary surface, they all now cast light, making them stand out even more in the environment. To see this content please enable targeting cookies. The original game extensively used physics objects, which tended to lead to a clash in lighting and shading for any moving objects, which were incongruous then with the static baked lighting. Turn on the path tracer and these moving objects are grounded into the environment with shadows of their own, while receiving and casting light themselves. Boss battles are transformed as those enemies are also fully grounded in the surrounding environments, perfectly integrated into the path-traced visuals - and even if the titanic enemies are off-screen, their shadows are not. The main difference in many scenes is just down to the new lighting - it's more physicalised now as dynamic objects are properly integrated, no longer floating or glowing strangely. One reason for this is due to lighting resolution. The original lighting was limited by trying to fit in 256MB of VRAM, competing for space with the game’s high resolution textures. Painkiller RTX's lighting and shadowing is achieved at a per-pixel level in the path tracer, which by necessity means that you tend to see more nuance, along with more bounce lighting as it is no longer erased away by bilinear filtering on chunky light map textures. Alongside more dynamism and detail, there are a few new effects too. Lit fog is heavily used now in many levels - perhaps at its best in the asylum level where the moonlight and rain are now illuminated, giving the level more ambience than it had before. There is also some occasional usage of glass lighting effects like the stain glass windows in the game now filtering light through them properly, colouring the light on the ground in the pattern of the individual mosaic patterns found on their surface. Half-Life 2 RTX - built on RTX Remix - recently received a demo release. It's the flagship project for the technology, but modders have delivered path traced versions of many modern games.Watch on YouTube New textures and materials interact with the path tracer in ways that transform the game. For some objects, I believe the modders used Quixel megascan assets to give the materials parallax along with a high resolution that is artistically similar to the original game. A stoney ground in the graveyard now actually looks stoney, thanks to a different texture: a rocky material with craggy bits and crevices that obscure light and cast micro shadows, for example. Ceramic tiles on the floor now show varying levels of depth and cracks that pick up a very dull level of reflectivity from the moon-lit sky. Some textures are also updated by running them through generative tools which interpret dark areas of the baked textures as recesses and lighter areas as raised edges and assigns them a heightmap. This automated process works quite well for textures whose baked features are easily interpreted, but for textures that had a lot of noise added into them to simulate detail, the automated process can be less successful. That is the main issue I would say with the RTX version so far: some of these automated textures have a few too many bumps in them, making them appear unnatural. But that is just the heightmap data as the added in material values to give the textures sheen tend to look universally impressive. The original game barely has any reflectivity, and now a number of select surfaces show reflections in full effect, like the marble floors at the end of the game's second level. For the most part though, the remix of textures from this mod is subtle, with many textures still being as diffuse as found in the original game: rocky and dirty areas in particular look much the same as before, just with more accurately rendered shadows and bounce lighting - but without the plasticy sheen you might typically find in a seventh generation game. Whether maxed on an RTX 5090 or running on optimised settings on an RTX 4060, the current work-in-progress version of Painkiller RTX can certainly challenge hardware. | Image credit: Digital Foundry Make no mistake though: path tracing doesn't come cheap and to play this game at decent frame-rates, you either need to invest in high performance hardware or else accept some compromises to settings. Being a user mod that's still in development, I imagine this could improve in later versions but at the moment, Painkiller RTX maxed out is very heavy - even heavier than Portal RTX. So if you want to play it on a lower-end GPU, I recommend my optimised settings for Portal RTX, which basically amounts to turning down the amount of possible light bounces to save on performance and skimping a bit in other areas. Even with that, an RTX 4060 was really struggling to run the game well. With frame generation on and DLSS set to 1080p balanced with the transformer model, 80fps to 90fps was the best I could achieve in the general combat zones, with the heaviest stages dipping into the 70s - and even into the 60s with frame generation. The mod is still work-in-progress, but even now, Painkiller RTX is still a lot of fun and it can look stunning if your hardware is up to it. But even if you can't run it, I do hope this piece and its accompanying video pique your interest in checking out Painkiller in some form. Even without the path-traced upgrade, this is a classic first-person shooter that's often overlooked and more than holds its own against some of the period's better known games.

Sludge Vohaul! Sierra made the games of my childhood. Are they still fun to play? Get ready for some nostalgia. Nate Anderson – May 17, 2025 7:00 am | 14 Story text Size Small Standard Large Width * Standard Wide Links Standard Orange * Subscribers only   Learn more My Ars colleagues were kicking back at the Orbital HQ water cooler the other day, and—as gracefully aging gamers are wont to do—they began to reminisce about classic Sierra On-Line adventure games. I was a huge fan of these games in my youth, so I settled in for some hot buttered nostalgia. Would we remember the limited-palette joys of early King's Quest, Space Quest, or Quest for Glory titles? Would we branch out beyond games with "Quest" in their titles, seeking rarer fare like Freddy Pharkas: Frontier Pharmacist? What about the gothic stylings of The Colonel's Bequest or the voodoo-curious Gabriel Knight? Nope. The talk was of acorns. [Bleeping] acorns, in fact! The scene in question came from King's Quest III, where our hero Gwydion must acquire some exceptionally desiccated acorns to advance the plot. It sounds simple enough. As one walkthrough puts it, "Go east one screen and north one screen to the acorn tree. Try picking up acorns until you get some dry ones. Try various spots underneath the tree." Easy! And clear! Except it wasn't either one because the game rather notoriously won't always give you the acorns, even when you enter the right command. This led many gamers to believe they were in the wrong spot, when in reality, they just had to keep entering the "get acorns" command while moving pixel by pixel around the tree until the game finally supplied them. One of our staffers admitted to having purchased the King's Quest III hint book solely because of this "puzzle." (The hint book, which is now online, says that players should "move around" the particular oak tree in question because "you can only find the right kind of acorns in one spot.") This wasn't quite the "fun" I had remembered from these games, but as I cast my mind back, I dimly began to recall similar situations. Space Quest II: Vohaul's Revenge had been my first Sierra title, and after my brother and I spent weeks on the game only to get stuck and die repeatedly in some pitch-dark tunnels, we implored my dad to call Sierra's 1-900 pay hint line. He thought about it. I could see it pained him because he had never before (and never since!) called a 1-900 number in his life. In this case, the call cost a piratical 75 cents for the first minute and 50 cents for each additional minute. But after listening to us whine for several days straight, my dad decided that his sanity was worth the fee, and he called. Much like with the acorn example above, we had known what to do—we had just not done it to the game's rather exacting and sometimes obscure standards. The key was to use a glowing gem as a light source, which my brother and I had long understood. The problem was the text parser, which demanded that we "put gem in mouth" to use its light in the tunnels. There was no other place to put the gem, no other way to hold or attach it. (We tried them all.) No other attempts to use the light of this shining crystal, no matter how clear, well-intentioned, or succinctly expressed, would work. You put the gem in your mouth, or you died in the darkness. Returning from my reveries to the conversation at hand, I caught Ars Senior Editor Lee Hutchinson's cynical remark that these kinds of puzzles were "the only way to make 2–3 hours of 'game' last for months." This seemed rather shocking, almost offensive. How could one say such a thing about the games that colored my memories of childhood? So I decided to replay Space Quest II for the first time in 35 years in an attempt to defend my own past. Big mistake. We're not on Endor anymore, Dorothy. Play it again, Sam In my memory, the Space Quest series was filled with sharply written humor, clever puzzles, and enchanting art. But when I fired up the original version of the game, I found that only one of these was true. The art, despite its blockiness and limited colors, remained charming. As for the gameplay, the puzzles were not so much "clever" as "infuriating," "obvious," or (more often) "rather obscure." Finding the glowing gem discussed above requires you to swim into one small spot of a multi-screen river, with no indication in advance that anything of importance is in that exact location. Trying to "call" a hunter who has captured you does nothing… until you do it a second time. And the less said about trying to throw a puzzle at a Labian Terror Beast, typing out various word permutations while death bears down upon you, the better. The whole game was also filled with far more no-warning insta-deaths than I had remembered. On the opening screen, for instance, after your janitorial space-broom floats off into the cosmic ether, you can walk your character right off the edge of the orbital space station he is cleaning. The game doesn't stop you; indeed, it kills you and then mocks you for "an obvious lack of common sense." It then calls you a "wing nut" with an "inability to sustain life." Game over. The game's third screen, which features nothing more to do than simply walking around, will also kill you in at least two different ways. Walk into the room still wearing your spacesuit and your boss will come over and chew you out. Game over. If you manage to avoid that fate by changing into your indoor uniform first, it's comically easy to tap the wrong arrow key and fall off the room's completely guardrail-free elevator platform. Game over. Do NOT touch any part of this root monster. Get used to it because the game will kill you in so, so many ways: touching any single pixel of a root monster whose branches form a difficult maze; walking into a giant mushroom; stepping over an invisible pit in the ground; getting shot by a guard who zips in on a hovercraft; drowning in an underwater tunnel; getting swiped at by some kind of giant ape; not putting the glowing gem in your mouth; falling into acid; and many more. I used the word "insta-death" above, but the game is not even content with this. At one key point late in the game, a giant Aliens-style alien stalks the hallways, and if she finds you, she "kisses" you. But then she leaves! You are safe after all! Of course, if you have seen the films, you will recognize that you are not safe, but the game lets you go on for a bit before the alien's baby inevitably bursts from your chest, killing you. Game over. This is why the official hint book suggests that you "save your game a lot, especially when it seems that you're entering a dangerous area. That way, if you die, you don't have to retrace your steps much." Presumably, this was once considered entertaining. When it comes to the humor, most of it is broad. (When you are told to "say the word," you have to say "the word.") Sometimes it is condescending. ("You quickly glance around the room to see if anyone saw you blow it.") Or it might just be potty jokes. (Plungers, jock straps, toilet paper, alien bathrooms, and fouling one's trousers all make appearances.) My total gameplay time: a few hours. "By Grabthar's hammer!" I thought. "Lee was right!" When I admitted this to him, Lee told me that he had actually spent time learning to speedrun the Space Quest games during the pandemic. "According to my notes, a clean run of SQ2 in 'fast' mode—assuming good typing skills—takes about 20 minutes straight-up," he said. Yikes. What a fiendish plot! And yet The past was a different time. Computer memory was small, graphics capabilities were low, and computer games had emerged from the "let them live just long enough to encourage spending another quarter" arcade model. Mouse adoption took a while; text parsers made sense even though they created plenty of frustration. So yes—some of these games were a few hours of gameplay stretched out with insta-death, obscure puzzles, and the sheer amount of time it took just to walk across the game's various screens. (Seriously, "walking around" took a ridiculous amount of the game's playtime, especially when a puzzle made you backtrack three screens, type some command, and then return.) Let's get off this rock. Judged by current standards, the Sierra games are no longer what I would play for fun. All the same, I loved them. They introduced me to the joy of exploring virtual worlds and to the power of evocative artwork. I went into space, into fairy tales, and into the past, and I did so while finding the games' humor humorous and their plotlines compelling. ("An army of life insurance salesmen?" I thought at the time. "Hilarious and brilliant!") If the games can feel a bit arbitrary or vexing today, my child-self's love of repetition was able to treat them as engaging challenges rather than "unfair" design. Replaying Space Quest II, encountering the half-remembered jokes and visual designs, brought back these memories. The novelist Thomas Wolfe knew that you can't go home again, and it was probably inevitable that the game would feel dated to me now. But playing it again did take me back to that time before the Internet, when not even hint lines, insta-death, and EGA graphics could dampen the wonder of the new worlds computers were capable of showing us. Literal bathroom humor. Space Quest II, along with several other Sierra titles, is freely and legally available online at sarien.net—though I found many, many glitches in the implementation. Windows users can buy the entire Space Quest collection through Steam or Good Old Games. There's even a fan remake that runs on macOS, Windows, and Linux. Nate Anderson Deputy Editor Nate Anderson Deputy Editor Nate is the deputy editor at Ars Technica. His most recent book is In Emergency, Break Glass: What Nietzsche Can Teach Us About Joyful Living in a Tech-Saturated World, which is much funnier than it sounds. 14 Comments

During a recent earnings call (courtesy of IGN), Take-Two Interactive CEO Strauss Zelnick said that he was “reasonably sure” that the company wouldn’t be affected by the US tariffs on imported goods. He attributed this to the fact that there has been quite a bit of confusion owing to the tariffs being issued and then withdrawn. Despite this confusion, however, he said that the fiscal guidance for Take-Two Interactive has been decided for the coming year. He also noted that, despite the tariffs, Take-Two already has a solid base of customers on all platforms except for the Nintendo Switch 2, which is slated for launch on June 5. Taking this into account, the company will likely not be affected by any changes to tariffs, according to Zelnick. “Our guide is for the next ten months, essentially, that’s the part of the fiscal year that hasn’t elapsed yet, and it’s very difficult to predict where tariffs will land, given how things have bumped around so far,” said Zelnick when asked about the tariffs. “We feel reasonably confident that our guide wouldn’t be meaningfully affected, unless tariffs ran off in a very different direction than we currently expect. In any case, there’s already a very substantial install base for all of our target platforms except Nintendo Switch 2, which is pre-launch. So we have, I think, enough insight that we wouldn’t be affected by any changes.” In its earnings report, the company has reaffirmed that it will be releasing a host of games on different platforms, such as Borderlands 4 on PC, PS5, Xbox Series X/S and Nintendo Switch 2, and Mafia: The Old Country on PC and current consoles. There are also games that are slated for release that don’t have confirmed platforms yet, including NBA 2K26 and WWE 2K26. With this in mind, it can be easy to see why Zelnick isn’t too concerned about the tariffs affecting the publisher. Leading up to the release of the Nintendo Switch 2, Zelnick said that he was feeling “great optimism” about Take-Two’s relationship with Nintendo. In the same earnings call, Zelnick mentioned how well Nintendo has been supporting third-party publishers to ensure that the Switch 2 has a strong line-up of games. “We’re launching four titles with Nintendo Switch 2, and that’s I think a bigger array of releases than we’ve ever offered before with a new Nintendo platform,” said Zelnick. “Historically, being a third party in the Nintendo business has been a bit challenging. I think Nintendo has been very forthcoming in addressing that. And we’re stepping up too, because we have great optimism for the platform.” In an interview with IGN right before the earnings call, Zelnick also spoke about how the decision to push the release of Grand Theft Auto 6 back from Fall 2025 to May 26, 2026 pained him, but that it will ultimately be worth it to give developer Rockstar Games more time to work on the game. “I feel really good about how fiscal 26 looks sitting here today,” he said. “And while of course, delays pain me — how could they not? — the most important thing to do is to support your teams in their search for perfection.”

During an excavation, amidst the Patagonian winds and hard rock, a fossil began to turn green. It was an unexpected reaction: the adhesive applied to protect the bones, fragile after millions of years beneath the ice, had interacted with plant matter trapped in the rock’s cracks. This greenish hue earned the fossil the nickname Fiona, like the ogre from Shrek.But Fionais much more than a ogre-themed name. It is the first complete ichthyosaur ever excavated in Chile and, even more remarkably, the only known pregnant female from the Hauterivian — a stage of the Early Cretaceous dating back 131 million years. Her skeleton, discovered at the edge of the Tyndall Glacier in Torres del Paine National Park — an area increasingly exposed by glacial retreat — belongs to the species Myobradypterygius hauthali, originally described in Argentina from fragmentary remains.The discovery, led by Judith Pardo-Pérez, a researcher at the University of Magallanes and the Cabo de Hornos International Center (CHIC), and published in the Journal of Vertebrate Paleontology, offers an unprecedented glimpse into ancient marine life — from how these majestic reptiles reproduced to how they adapted to oceans vastly different from those of today.An Ichthyosaur Maternity Ward in Patagonia(Image Courtesy of Irene Viscor)So far, 88 ichthyosaurs have been found on the Tyndall Glacier. Most of them are adults and newborns. Two key facts stand out: food was abundant, and no other predators were competing with them.Fiona, who measures nearly 13 feet long, is still encased in five blocks of rock. Despite the challenge, she was transported to a local clinic, where CT scans allowed researchers to study her skull and body. Her species was identified thanks to one of her fins. “There’s no other like it in the world,” says Pardo-Pérez. The limbs were remarkably elongated, suggesting this animal was built for long-distance swimming.Inside her, there were more surprises. One of them was her stomach contents, which revealed what may have been her last meal: tiny fish vertebrae. But the most striking find was a fetus, about 20 inches long, already in a position to be born.“We believe these animals came to Magallanes — the southern tip of Chilean Patagonia — from time to time to give birth, because it was a safe refuge,” Pardo-Pérez says. “We don't know how long they stayed, but we do know that mortality was high during the first few days of life.”One of the big unanswered questions is where they went next, as there are no records of Myobradypterygius hauthali, apart from a piece of fin found in Argentina. The most abundant remains come from southern Germany, but those date back to the Jurassic period, meaning they’re older.Palaeontologist Erin Maxwell suggests, “In many modern ecosystems, species migrate to higher latitudes during the summer to take advantage of seasonally abundant resources and then move to lower latitudes in winter to avoid harsh conditions,” she explains. “We believe Mesozoic marine reptiles may have followed similar seasonal patterns.”Sea Dragon GraveyardThe environment where Fiona was discovered — dubbed the "sea dragon graveyard" — also has much to reveal.According to geologist Matthew Malkowski of the University of Texas at Austin, the Hauterivian age is particularly intriguing because it coincided with major planetary changes: the breakup of continents, intense volcanic episodes, and phenomena known as "oceanic anoxic events," during which vast areas of the ocean were depleted of dissolved oxygen for hundreds of thousands of years.One such poorly understood event, the Pharaonic Anoxic Event, occurred around 131 million years ago, near the end of the Hauterivian, and still raises questions about its true impact on marine life. “We don't have a firm grasp of how significant these events were for marine vertebrates, and geological records like that of the Tyndall Glacier allow us to explore the relationship between life, the environment, and Earth’s past conditions,” Malkowski notes.Evolution of IchthyosaursReconstruction of Fiona. (Image Courtesy of Mauricio Álvarez)Don't be misled by their body shape. “Ichthyosaurs are not related to dolphins,” clarifies Pardo-Pérez. Although their hydrodynamic silhouettes may look nearly identical, the former were marine reptiles, while the latter are mammals. This resemblance results from a phenomenon known as convergent evolution: when species from different lineages develop similar anatomical features to adapt to the same environment.Ichthyosaurs evolved from terrestrial reptiles that, in response to ecological and climatic changes, began spending more time in the water until they fully adapted to a marine lifestyle. However, they retained traces of their land-dwelling ancestry, such as a pair of hind flippers — absent in dolphins — passed down from their walking forebears. They lived and thrived in prehistoric oceans for about 180 million years, giving them ample time to refine a highly specialized body: their forelimbs and hindlimbs transformed into flippers; they developed a crescent-shaped tail for propulsion, a dorsal fin for stability, and a streamlined body to reduce drag in the water. Remarkably, like whales and dolphins, “ichthyosaurs had a thick layer of blubber as insulation to maintain a higher body temperature than the surrounding seawater and gave birth to live young, which meant they didn’t need to leave the water to reproduce,” explains Maxwell.Whales and dolphins also descend from land-dwelling ancestors, but their transition happened over a comparatively short evolutionary timespan, especially when measured against the long reign of the ichthyosaurs. “Their evolution hasn't had as much time as that of ichthyosaurs,” notes Pardo-Pérez. “And yet, they look so similar. That’s the wonderful thing about evolution.”Read More: Did a Swimming Reptile Predate the Dinosaurs?Fossils on the Verge of DisappearanceOne of the key factors behind the remarkable preservation of the fossils found in the Tyndall Glacier is the way they were buried. According to Malkowski, Fiona and her contemporaries were either trapped or swiftly covered by underwater landslides and turbidity currents — geological processes that led to their sudden entombment.But the good fortune that protected them for millions of years may now be running out. As the glacier retreats, exposing fossils that were once unreachable, those same remains are now vulnerable to wind, rain, and freeze-thaw cycles, which crack the surrounding rock. As vegetation takes hold, roots accelerate erosion and eventually conceal the fossils once again.“While climate change has allowed these fossils to be studied, continued warming will also eventually lead to their loss,” Maxwell warns. In Fiona’s story, scientists find not only a record of ancient life, but also a warning etched in stone and bone: what time reveals, climate can reclaim.Article SourcesOur writers at Discovermagazine.com use peer-reviewed studies and high-quality sources for our articles, and our editors review for scientific accuracy and editorial standards. Review the sources used below for this article:María de los Ángeles Orfila is a science journalist based in Montevideo, Uruguay, focusing on long-form storytelling. Her work has appeared in Discover Magazine, Science, National Geographic, among other outlets, and in leading Uruguayan publications such as El País and El Observador. She was a fellow in the 2023 Sharon Dunwoody Mentoring Program by The Open Notebook and often explores the intersections of science, culture, and Latin American identity.