All of my games are available to everyone for free.
However, if you enjoyed any of my games, a couple of bucks to cover website hosting costs and support my ongoing efforts would be gratefully appreciated. I think $2 per game enjoyed is a fair price. Thanks.
Dropbox (250MB Extra space)
Penzu (20% off yearly subscription)
Hole in the Wall Hosting ($10US per year for 300mb space, 30gb bandwidth)

(meant to say: I've only played *one* of these. Obviously ;))
Btw, it's worth mentioning that Mirror's Edge isn't really a FPS - as you can play the entire game without shooting anyone :)