Portal: Catalyst
PuzzleCaught in the crossfire of Portal's ending, return to the ever-expanding and changing Aperture facility from a brand-new perspective of a new Test Subject...
Discord server - Discord.gg
Subreddit - Reddit.com
Youtube - Youtube.com (This is my personal channel, it's not completely focused on Intrusion.)
Discord Punishment Appeal Form - Forms.gle
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Caught in the crossfire of Portal's ending, return to the ever-expanding and changing Aperture facility from a brand-new perspective of a new Test Subject...
When Benjamin Carter is thrown into an Aperture prison for a murder he didn't commit, he is mysteriously released from his cell three days later. Who...
Coming ????, a new captivating puzzle campaign. Backstock teaches you new puzzle solving techniques, and demands you don't fall behind. Discover the future...
Portal 2: Alive Again is a mod that tries to actually faithfully bridge the gap between portal 1 and portal 2 while still vastly improving on the original...
Have you ever wondered: Why does Aperture look so different in Portal 2? There are holes in this story, questions left unanswered! Conversion is here...
This mod is now cancelled. However, the portal 1 version is still available.