Gamefly.For $16 a month, you can rent one game at a time for as long as you want. There are other packages where you can rent more games at once for higher costs. You can also 'keep' games you rent for a 'used' price if you really want to. Only real downside is you have to wait for shipping (Tekken 6 probably won't get to me until Friday, for example).
TF2 is a FPS.

@Bolivar, 'experiencing' those events in CoD4 (and maybe others...I've only played 2 and 4) gets you familiar with the fact that Infinity Ward likes to have these emotional setpieces. Trying to make you feel something. This instance in MW2 is definitely morally heinous, but is in line with what they have done before in the sense of trying to get you to feel something. Perspective is more than just what you see in front of you. So while what you see in front of you is "THAT," you have the context of prior experience which should allow you to can kind of see where they are coming from. Even if what is actually happening is horrible, you would have a good idea that there should be something more to it. (I'm saying 'you', but I'm not exactly directing it at 'you'.)

Whereas, if you hadn't experienced any of that before from the creators, all you see is what's actually happening in front of you. Which is absolutely horrible.