Portal has been called one of the most innovative games of the decade. A hybrid of FPS style and a new genre of spatial brain teasers, Portal offers hours of totally unique gameplay.
Set in the mysterious Aperture Science Laboratories, players must solve physical puzzles and challenges by opening portals, maneuvering objects, and moving themselves through space in ways that used to be impossible.
Playing Portal today will teach you how to love a "companion cube", whether a computer named GLaDOS really wants you dead, and why your friends keep telling you "the cake is a lie".
September last year, NVIDIA announced a RTX Remix modding tool, which when complete, aimed to provide universal modding capability, to any game running Direct X 8/9. More than that, it also aimed to offer real time raytracing, texture scaling and other shiny bells and whistles for modders to explore.
In December, we got our first glimpse at RTX Remix in action, with the free release of Portal with RTX, the puzzle classic from Valve reimagined in modern splendor. The tools NVIDIA used to make this possible started to be released into creators hands, and work begun on the next project, to invite modders to remix the critically acclaimed Portal: Prelude mod, which among its many accolades is the highest-rated Portal mod on ModDB, and placed 3rd overall Player’s Choice mod of 2008 vs all other mods on the site.
8 months on, and the RTX remaster of this glorious mod is out - trailer above should trigger some nostalia. What's new in this RTX release, is full ray tracing, new, hand-crafted hi-res physically-based textures, and new, enhanced high-poly models evocative of the originals, using all the latest tech from NVIDIA.
As a refresher, Portal Prelude is an unofficial Portal prequel by Nicolas "NykO18" Grevet, and is set before the time of GLaDOS. Featuring an extremely challenging 8-10 hour campaign composed of 19 new test chambers, new advanced gameplay mechanics, a fully voiced story with NPCs, and more, this mod is bound to keep even the most intrepid gamers busy.
It is the first remaster created entirely by modders with the RTX Remix creator toolkit, we can't wait to see more as the tooling matures. You can find this mod available now on Steam.

User testing is coming soon. Come test with us.
While preparing for this August, I decided it's time to upgrade the over two year old opening maps! See some before and after pictures from the second...
This is the story of how the mod got started plus some extra info.
Hello Test Subjects! In this update I discuss the map 1's makeover and the new team members!
Contains instructions on how to setup a dedicated server for Portal: Cooperative Beta 1.1.3
The download for Portal: Cooperative version Beta 1.1.3
Add RTX support for Factum Souls mod.(Already included all previous patches!) - HOW TO INSTALL - Before you install the mod, make sure the following things...
Contains instructions on how to setup a dedicated server for Portal: Cooperative Beta 1.0.3
Fixed the ending sequence crashing on dedicated servers.
This mod by the Portal: Prelude Team is the prequel to the Portal game. Features include more gameplay hours than the original game, 8 chapters, 19 test...
Man I wish I can go back. Because of this is a pretty nostalgia game.
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ianluca
probably the best game in 2007.
A Good game in 2007 i wish i could go back
Best logic game!
best game ever!
Short game, but still fun!
Mods aren't working for me after update to new content system.
Looks like some mods need indivual fixes to run with the SteamPipe version