I know it's a really old game, but Shogo MAD (Mobile Armour Division) is an awesome game even today. Heres the link: http://www.shogo-mad.com (Also I should mention that you need to go here http://www.planetshogo.com/ and scroll to the bottom for a GeForce fix to run it)
EDIT: The fix for Shogo + GeForce is a registry file so it will affect everything, not just Shogo. [quote:3tosxic2]Downsides to doing this? Well, you can leave this setup as is and it may actually increase performance in some games by upping the frame rate (Quake3, Half-Life, Hitman, Max Payne, Unreal Tournament, Tribes 2, GTA2 and most of the current demos out now work just fine with this fix, tested by Coonz). If not, simply change the setting for Vertical Sync in the Display Properties of your desktop.
Also, that quote just made me remember, Starseige Tribes is another great game (free/abandoned) but you would also need to edit some settings to connect to the new master servers since the official master server is gone now.