Portal 1 is free untill the 20th PC/MAC

[Moren]

Well, I could play it, my verdict.
+ Great villain
+ Innovative and great concept
+ Great voice actress
+ Good Graphics (IMO)
- Short
- Same layouts
- My weak stupid PC lagged for 1/5 of the game.

I wanna buy Portal 2 now, but I'm not sure because since it has better graphics it might run badly.