After evry time i play my game, in a few minutes will the game close, and steam is crashing, D: help?

SjorsMaster, hey nice too see you, didnt we talked in YouTube?

Oh and for your Problem: Did you verify the cache portal 2 in steam?

Also if the verify cache doesn't work, try puting "-condebug" in the command line for portal 2 and it will generate a console.log file; which you should post for someone to figure out.

Yeah thanks for the cmd! it works now!