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Portal 2

Portal 2 screenshot
2 068
playing now
99%
positive
466 542
reviews
1–2
players

Why it is here

The co-op campaign that every puzzle game is measured against.

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

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Two brains, one solution, no way to solo it.
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TERRON
From the people who made this catalog

TERRON — conquer the world in your browser

Free, no install, no account: a real-time strategy where the whole lobby fights over one map. Not co-op — the opposite of it — but the evening is still spent with the same friends.

Play in the browser →
Is Portal 2 friendslop, or just co-op?
One click, no signup. The split in this catalog is one person's call — this is how it gets corrected.