The game is viewed from a first-person perspective. Players move through enclosed underwater environments, search for routes and supplies, fight hostile creatures, and attempt to reach the level exit.

Progression is organized around a sequence of maze-like stages. Exploration and ammunition management are important, while hidden areas and environmental obstacles can make navigation less direct.

Explore each passage carefully before committing to a route, and keep track of unexplored branches so that key areas are not missed.

Conserve ammunition when possible, use the environment to create distance from enemies, and search side rooms for weapons or other useful supplies.