Need a game to play during the free days? Apart from the already mentioned World of Goo
, what about the real time strategy game Command & Conquer? Not the new sucked-out one with colorful 3d graphics but the old, original Command & Conquer 1? It's available for free now, just download it from EA
. Even works on Vista.
I had a lot of fun playing the missions again which I did last time in 1995. Still a great game.