Portal 2

The "Perpetual Testing Initiative" has been expanded to allow you to design co-op puzzles for you and your friends!

Developer: Valve.

Tags: Solo · Co-op, Platformer, Puzzle, First-Person.

Steam reviews: Overwhelmingly Positive (99% of 433,510).

Price: $9.99.

Released 2011-04-18.

Last updated 2026-06-29.

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