S
- Samurai Shodown V
- Secret Weapons Over Normandy
- SEGA GT Online
- SEGA Sports NBA 2K3
- SEGA Sports NFL 2K3
- SEGA Sports NHL 2K3
- Serious Sam II
- Shadow Ops: Red Mercury
- Shattered Union
- Sid Meier's Pirates!
- Sniper Elite
- Soldier of Fortune 2: Double Helix
- Spikeout: Battle Street
- Splat Renegade Paintball
- Split/Second Velocity
- Spy vs. Spy
- Stacked with Daniel Negreanu
- Star Wars Battlefront
- Star Wars Battlefront II
- Star Wars: The Clone Wars
- Star Wars Jedi Knight: Jedi Academy
- Star Wars: Knights of the Old Republic
- Star Wars Republic Commando
- Steel Battalion: Line of Contact
- Stolen
- Street Fighter Anniversary Collection
- Street Racing Syndicate
- Strike Force Bowling
- SVC Chaos: SNK vs. Capcom
- SWAT: Global Strike Team
Read more about this topic: List Of Xbox Network Games