Yes, it use Portal's character models and game engine. You might also need Source Base.
You need to buy Portal in order to play the mod Portal: Prelude.
In order to play the mod Portal: Prelude, you do need to have Portal.
If you want to play the game on a PC or a Mac, yes.
you can play mario bros with portal gun online
kaijudo portal kaijudo portal
The Prelude to The Afternoon of A Faun is a work for full orchestra. One person could not play it.
no you do not need to
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
Urm... you just buy Portal 2 from Steam and then play it...
Yes you need the original Sims 2 and Sims 3 to play these games.
How many people played portal 2
You do not need the original sims 1 to play the sims 3 world adventures. You need to have the original sims 3 base game to be able to play world adventures.