You play as Chell the same as in the first portal and In CO-OP, you can play as two robots named Atlas and P-body
How many people played portal 2
Urm... you just buy Portal 2 from Steam and then play it...
How many people played portal 2
Portal does not have online like Black Ops and Halo, etc. Portal 2 does have a Co-op though so you can play with friends.
No portal 2 is the only game that does that.
You need to buy Portal in order to play the mod Portal: Prelude.
Sure can.
If you want to play the game on a PC or a Mac, yes.
you can play mario bros with portal gun online
the Orange Box gives you 5 games in one, Half-Life 2 and episodes 1 and 2, Team fortress 2, and finally Portal. all complete and all very fun to play. Portal is a game that is found in the Orange Box
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Not legally, but it is according to most people worth the money.