Fringe on 29/1/2009 at 16:08

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I keep pimping GameTap on here, but it has all kinds of old arcade games (especially fighting games) set up for multiplayer and that should work on pretty much any computer. You (http://www.gametap.com/video-games/challenge-games) can play a lot of them for free, and there's a great deal of variety.

Shadowcat on 30/1/2009 at 22:01

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(Besides those mentioned already)

I can't find my full list, but I've remembered these ones:

Ghost Recon
Vietcong
No One Lives Forever 2
Duke Nukem 3D
Heretic 2
Project Eden
Obscure
Baldur's Gate 1 & 2
Most racing games