As elie-7 I would pay for working software right now and some working apps.

Back to the OP.
Assuming you can get controls working 100% I would pay for Fallout 3, and probably lose my job because I didn't do anything but.

But to be realistic with money and maybe something like $20 and the controls still needing work, I would be more than happy with plants versus zombies, or something like starcraft or C&C. Still guaranteed to work and install.