Portal: Revolution Mod Out Now, Featuring 8+ Hours of Gameplay with 40+ New Puzzles

wccftech.com:

Modding team Second Face Software has finally released the long-awaited Portal: Revolution mod on Steam. This free Portal 2 mod features over eight hours of gameplay and over forty brand new puzzles.

Portal: Revolution is set before the events seen in Portal 2, acting as a narrative bridge between the first and second official installments. Players find themselves in the Aperture facility as test subjects awoken by a personality sphere called Stirling. They'll join his mission to find a powerful device supposedly capable of restoring Aperture to its former glory.

Over 40 new puzzles
The campaign contains 40 brand new puzzles making use of new test elements and presents existing mechanics in a new way not seen in Portal 2.

Difficulty
Portal: Revolution puzzle difficulty starts where Portal 2 stops, but fear not. All new mechanics and advanced portal tricks are taught to you. We have ensured through rigorous playtesting that every player can solve the puzzles. Although very few chambers require portals to be fired mid-air, no puzzles require advanced tricky movement. Depending on your experience with Portal 2 mechanics, you can expect about 5 to 7 hours of playtime.

The mod is powered by the Portal 2: Community Edition's engine, a custom version of the Counter-Strike: Global Offensive Source Engine branch using licensed source code provided by Valve. This allowed Second Face Software to introduce many mechanics and improvements to the engine to create an experience that would be impossible in Portal 2, according to the studio.

It won't be as shiny as the Portal RTX and Portal: Prelude RTX, of course, but it should still look fine. Also, given that Portal: Prelude was itself a mod, perhaps someone will decide to make an RTX