It was released for Amiga, Amstrad CPC, Atari ST, Commodore 64, MS-DOS, and ZX Spectrum.

Players control the titular slug who must traverse caverns in order to capture maggots in bubbles, then guide them to his starving young who wait in a nest.

Steg can jump and adhere to and move along walls and ceilings to visit the nest and locate maggots.

Maggots roam the game's caverns and must be captured in the bubbles which Steg can blow in order to transport them.

[4][1] Power-ups include a set of robotic legs, a jet pack and boosts to Steg's speed and energy bar.