>>47863
Portal 1 is a quirky puzzle game in which you use wormholes that allow you to teleport around a room to solve puzzle.
The game has a story about a AI that goes rougue and has some very clever writing.
It's good, go play it.

Portal 2 is more of portal with lots of new mechanics thrown into the mix.
Its story continues where the last one ended. If you liked the first one you'll like the second.
It's also good, play it after the first one.

>>48260
This, also couch multiplayer.
Have fun with your friends next to you.
I sure had tons of fun playing portal 2 with a friend of mine.