Simplify the following text for a Grade 12 native English-speaking person.
Original: RAGE Main article : Rockstar Advanced Game Engine Rockstar Games have developed their own game engine called the Rockstar Advanced Game Engine ( RAGE ) to facilitate game development on the PlayStation 3 , Xbox 360 , Windows , and Wii systems .
Simplified: Rockstar Games have developed their own game engine called the Rockstar Advanced Game Engine ( RAGE ) to facilitate game development on the PlayStation 3 , Xbox 360 , Windows , and Wii systems .