Steam has some package deals that are a pretty cool idea. I've never played most of these, however.
Eidos Collector Pack - $99.99
Commandos: Behind Enemy Lines,
Commandos: Beyond the Call of Duty,
Commandos: Strike Force,
Commandos 2: Men of Courage,
Commandos 3: Destination Berlin,
Hitman: Codename 47,
Hitman 2: Silent Assassin,
Hitman: Blood Money,
Battlestations: Midway,
Just Cause,
Deus Ex: Game of the Year Edition,
Deus Ex: Invisible War,
Thief: Deadly Shadows,
Tomb Raider: Legend,
Tomb Raider: Anniversary,
Project: Snowblind,
Rogue Trooper,
Infernal,
Kane and Lynch: Dead Men™,
Conflict: Denied Ops
Rockstar Collection - $59.99
Grand Theft Auto,
Grand Theft Auto 2,
Grand Theft Auto 3,
Grand Theft Auto: Vice City,
Grand Theft Auto: San Andreas,
Manhunt,
Max Payne,
Max Payne 2,
Midnight Club 2,
Wild Metal