What's your favourite game?

I probably won't know what your talking about, so tell me what the game is about, what system it's for (or if it's a flash game or PC game just say computer) and why you like it.

If you change your mind, then tell me what's your new favourite game! I'd like to hear from all of you! :)

I don't like video games that much, but a few favourites are halo, especially online, half-life and gears of war. God of War is pretty good too.

If you want to know what flash games I like, just take a look at my favourites :) Tetris is good too.
I also like to listen to classic and rock music. Love songs are good too :)