As I have done with ALL but 2 of my games, I d/l em befor I buy em, to see how it'll run. The 2 times I havn't done this was with deus ex, and I never got past level 2 because I went to os x, and aspyr never updated it for X, so basicly was a waist of $$. 2nd was recently with aliens VS predator 2. I played the marines part on my buddies PC and loved every second o fit, I just hope the mac port holds up. As far as spy hunter goes, its hard to say. WIll I be buying it? No. I played 3 levels, on the keyboard and was amussed, but its not worth my 45 bucks. It runs really well on my G4 DP 800, Geforce 4 Ti. It looks pretty good also, but is REALLY linear. So if you don't mind this form of game play.
1. Play level, learn where stuff is, fail mission.
2, Replay again after learning where everything is so you can advance level.
3. repeat steps 1 and 2 for next level.
Go get it bud! I also recomond only geting it if you own a supported game pad, cause it kinda sux on the keyboard. Hope that helps a little.