Meltdown

In Meltdown, you must make your way through the offices of a lunar reactor building, shooting robot workers and solving puzzles, before heading to the core to prevent a nuclear meltdown using an RMV (remote manipulation vehicle). This is an isometric exploration game, but you must frequently log on to computer terminals scattered throughout the building, to play puzzle games against a rogue computer system. Winning these games gives you letters of passwords to the next floor, a bit like an isometric Impossible Mission.