R:

R.B.I. Baseball - Xbox Live Arcade
http://xboxamerica.com/games/617/R.B.I.-Baseball

Raiden IV
http://xboxamerica.com/games/373/Raiden-IV

Rapala Tournament Fishing
http://xboxamerica.com/games/318/Rapala-Tournament-Fishing

Ratatouille - Action
http://xboxamerica.com/games/377/Ratatouille

Rayman: Raving Rabbids - Adventure
http://xboxamerica.com/games/232/Rayman:-Raving-Rabbids

Resident Evil 5 - Action
http://xboxamerica.com/games/65/Resident-Evil-5

Return to Castle Wolfenstein - Shooter
http://xboxamerica.com/games/178/Return-to-Castle-Wolfenstein

Rez HD - Xbox Live Arcade
http://xboxamerica.com/games/547/Rez-HD

Ridge Racer 6 - Racing
http://xboxamerica.com/games/123/Ridge-Racer-6

RoboBlitz - Xbox Live Arcade
http://xboxamerica.com/games/157/RoboBlitz

Robotron: 2084 - Xbox Live Arcade
http://xboxamerica.com/games/135/Robotron:-2084

Rock Band - Music & Dance
http://xboxamerica.com/games/439/Rock-Band

Rocket Riot - Xbox Live Arcade
http://xboxamerica.com/games/615/Rocket-Riot

Rocketmen: Axis of Evil - Xbox Live Arcade
http://xboxamerica.com/games/387/Rocketmen:-Axis-of-Evil

Rockstar Games presents Table Tennis - Sports
http://xboxamerica.com/games/85/Rockstar-Games-presents-Table-Tennis

Rocky & Bullwinkle
http://xboxamerica.com/games/550/Rocky-&-Bullwinkle

Rogue Warrior - Shooter
http://xboxamerica.com/games/306/Rogue-Warrior

Roogoo
http://xboxamerica.com/games/558/Roogoo

Root Beer Tapper™ - Xbox Live Arcade
http://xboxamerica.com/games/80/Root-Beer-Tapper™

Rumble Roses XX - Fighting
http://xboxamerica.com/games/18/Rumble-Roses-XX

Rush’n Attack - Xbox Live Arcade
http://xboxamerica.com/games/397/Rush’n-Attack