Gamma
From OCE Space Simulation
The Gamma reality constitutes everything that happens in a simulation in the world of the simulation. The gamma reality is a subset of the Beta reality in which it is acknowledged that the OCESS simulation equipment is merely simulation equipment and not actual space hardware.
The Gamma reality is usually used for Training Missions to prepare the Astronauts, Mission Control, and Simulators for the Mission, which takes place in the beta reality.