The most important thing to know about Bay 12: Mech Repair is that these are mechs of the MechWarrior or possibly Patlabor school – that is, basically WW2 tanks on hydraulic legs, with cockpits full of switches and wireframe displays. Their bodies are assemblages of pistons and reactors. They are not biomechs like the ones in Evangelion. An Evangelion Repair game would be… different.