Trainz is a series of 3D train simulator video games. The Australian studio Auran (since 2007 N3V Games) released the first game in 2001. The simulators consist of route and session editors called Surveyor, and the Driver module, that loads a route and lets the player operate and watch the trains run, either in "DCC" mode, which simulates a bare-bones Digital Command Control (DCC) system for the simple stop-and-go of a basic model railway, or "CAB" mode, which simulates real-world physics and adds working cab controls.