Top Voted Answer
Yes, Portal 2 has multiplayer.
The multiplayer consists of a somewhat short co-op campaign, This can be played via splitscreen, system link, or over Xbox LIVE. While the game does discourage playing with people who are not your friends (it goes so far as to say it's not as much fun with non-friends), you do have the option of letting the matchmaking service set you up with a random person online. Sunblast - 10 years ago - report
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