FlatOut is priced at $5.99, while Unreal 2 and UT2004 carry a $9.99 tag. Read on for the official descriptions, straight from Good Old Games curator CD Projekt:

FlatOut - $5.99
Drivers thrown across the track, shattered fences, mangled cars, exploding tire walls, and that's just the first corner! Use every trick, shortcut and jump as you battle 7 rivals for the championship. FlatOut delivers a thrilling combination of high-octane racing, smash-em-up demolition derby action and death defying stunts propelling the driver through the windshield!

Unreal 2: The Awakening - $9.99
As John Dalton, a Terran Colonial Authority Marshal, you're humanity's only hope for salvation. In Unreal 2: The Awakening you have to retrieve seven pieces of an ancient artifact to create a powerful weapon and save the human species. Get caught up in the intense action and gripping plot that reveals through briefings, cut-scenes, in-game dialogues and the missions themselves. Use the included Unreal Editor, design your own game mods and challenge others to enter your personal Unreal universe.

Unreal Tournament 2004 Editor’s Choice Edition - $9.99
The new Tournament brings a totally new kind of multiplayer experience. As the ultimate techno-gladiator of the future, you will take your fate into your hands, battling against up to 32 other players online in action-packed, frag-filled arenas. Ten game modes, huge arsenal of new weaponry, land and air based vehicles and more than 95 maps gives you almost unlimited number of chances to embarrass your online opponents. Unreal Tournament 2004 Editor's Choice Edition adds a wide selection of the best user-made game modifications hand-picked by the designers at Epic Games.