"Sonic Heroes" was the first multi-platform "Sonic" game: it was developed for the GameCube, PlayStation 2 (PS2), and Xbox. Unlike the "Sonic Adventure" games, made using proprietary software, Sonic Team partnered with Criterion Software to use the RenderWare game engine so the game could be programmed and ported with ease to each platform. Though Sonic Team was able to transfer some textures and models from the "Sonic Adventure" games into "Sonic Heroes", most of their work started from scratch. Sonic Team found challenges in working with the Xbox and PS2, platforms with which they had little experience. The content in all versions is the same, but the PS2 version runs at 30 frames per second (FPS) in contrast to the other versions running at 60 FPS. Sega's Noah Musler explained that running the PS2 version at 60 FPS would have caused performance problems. Iizuka also noted the system is less powerful than the GameCube and Xbox. Iizuka and Naka decided against including console-exclusive content so players could have the same experience regardless of console.