Portal: Catalyst

Portal 2 mod |

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, thrown into the chaos of a facility in disarray after the destruction of GLaDOS at the hands of Chell.

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Third Anniversary - Development Update #3

Third Anniversary - Development Update #3

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Join us as we review what Catalyst has been up to, now that we're in our third year of development!

Refurbishment Showcase - Development Update #2

Refurbishment Showcase - Development Update #2

News 3 comments

Join us in this article as we go over the new Refurbishment style featured in Chapter 4 of Catalyst, showing off gameplay for the very first time and...

Catalyst's First Development Anniversary is Here!

Catalyst's First Development Anniversary is Here!

News 8 comments

Come join us as we recap on everything that's occured over the past year of development, and as we reveal new exciting announcements!