Erwin Coumans: AAA Titles using Bullet. In: Real-Time Physics Simulation Forum. 5. Januar 2009, abgerufen am 2. Februar 2018 (englisch): „[W]e are allowed to mention that some parts of Bullet have been co-developed and optimized with Rockstar and merged into their Rage game engine, used on XBox 360, PC and PLAYSTATION 3 in Midnight Club: Los Angeles and Grand Theft Auto 4.“