Countdown to Shutdown (originally released as Countdown to Meltdown in Europe) on the Commodore 64 is a 3D-ish, arcade-style puzzle-action game set in a subterranean nuclear power plant that’s on the verge of disaster. You remotely control a team of up to eight maintenance droids roaming a maze of corridors, lifts, and rooms, trying to locate and reach the overheating core chamber and activate cooling systems before time runs out. Each robot has limited energy and can be damaged by hazards or enemies, so you constantly swap between them, open doors, ride elevators, and figure out the plant’s layout while the meltdown timer keeps ticking, making it a tense mix of navigation, resource management, and mapping under pressure.