make sure there good. i want something with nonstop action where theres lots of killing. you know a shooter. and also i want good simulation games.

You violent bastard...
Apache VS Havoc
Duke Nukem 3D
Ghost Recon
Far Cry
Duke Nukem: Manhattan Project
Painkiller

Good sim game would be The Guild Gold. Michaelleung has everything else covered, it seems.

You want killing? Die by the Sword

Hmm, I'd suggest freespace 2, far cry, cannon fodder, messiah, IL2 1946 & maybe jagged alliance 2 or fallout tactics if you're in a tactical mood
I can't honestly recomment duke 3d or any of the apogee games on account of how lame they are but if you're after shooters you could do worse

Funny how that never works out properly.

oh but it does, you can then gift to five people.

And tell them to give them back.

why would you do that? thread title is obviously what six games to buy, and if he buys redneck rampage six times, and gives one to five friends, he'll have a better chance of having a better friendship with these people than he would if he said "fark u gays, I'm getting the games for meself."

I don't care what games you usually play. If you haven't played Sacrifice and Giants: Citizen Kabuto, then you haven't lived ;-)

My good man, you insult me! I haven't played Sacrifice :(

Please do so. Run, don't walk, to your nearest credit card.

Then you haven't lived ;-)
Seriously, as games go, Sacrifice is completely unique, and a work of art. It's difficult as hell too, but it makes you want to keep trying. I highly recommend it.

Duke Nukem 3D, Duke Nukem Manhattan Project, Kingpin, Il-2 Sturmovik and Giants.