The game is viewed from the side as Nina moves through a multi-screen complex. Her objectives involve searching the facility, overcoming security forces, locating useful items, and completing the mission before her available opportunities run out.

Nina can move, jump, fight at close range, and use weapons or objects encountered during the mission. Progress depends on learning the layout, choosing safe routes, and managing encounters rather than simply defeating every enemy. The structure rewards exploration, but hazards and enemy placement make careless movement costly.

Study each area before committing to a route. Avoid unnecessary fights when a guard or hazard can be bypassed, because lost health and lives make later sections much harder.

Search side passages and remember the locations of items, entrances, and dangerous screens. Progress comes from route knowledge as much as from reflexes, so repeated attempts should be used to map the complex and refine the safest path.