It’s also a project where you get a prequel story, but you have to own one of the Portal games.

Portal 2 is currently available on Steam for about a dollar. This IP is another example of Valve not being able to count to three after Half-Life and Team Fortress. So far, Aperture Labs’ only official use is a VR headset or a handheld PC tutorial, which isn’t much.

But Portal fans didn’t stop there: even though we wrote about Portal 64: First Slice a few days ago, another project has popped up that’s worth mentioning. There are plenty of Fan Test Chambers, original stories and full campaigns on Steam Workshop, but Portal: Revolution, running on the community-modified Source engine Strata Source, is something different.It’s an original story that takes about seven hours to play through, with new characters and mechanics, and takes place between the first and second parts of Portal.Second Face Software’s concept is so big that Valve is behind it, so it has its own Steam page, and even though it’s based on Portal 2 (which you need to have to run it), it’s enhanced with things that weren’t possible in the original game.A cartoonishly styled AI core named Stirling awakens the anonymous Aperture test subject, and all of this takes place decades before Wheatley discovers Chell.He asks us to rebuild Aperture after some “monster” destroyed it.Stirling got a full voiceover, but even in chapter four the player doesn’t get the orange portal button (while the blue portal-shooting gun shows up early).

In addition to the blue and orange gels, there are new “cleansing” showers that neutralize their effects and clean already stained cubes underneath. The story may not be to everyone’s taste, and Stirling’s personality may be a little dry, but it’s still an excellent mod, and free if you already own Portal 2…

Source: PCGamer