Manic Miner is a platform video game originally written for the ZX Spectrum by Matthew Smith and released by Bug-Byte in 1983 (later re-released by Software Projects). It is the first game in the Miner Willy series and among the early titles in the platform game genre.

In each of the twenty caverns are several flashing objects, which the player must collect before Willy's oxygen supply runs out. Once the player has collected the objects in one cavern, they must then go to the now-flashing portal, which will take them to the next cavern. The player must avoid enemies which move along predefined paths at constant speeds. Willy can also be killed by falling too far, so players must time the precision of jumps and other movements to prevent such falls or collisions with the enemies.

Extra lives are gained every 10,000 points, and the game ends when the player has either no lives left, or completes all twenty caverns and escapes to the open air.