The game uses a side-view perspective. Lester must move through hostile environments, avoid traps, solve environmental problems, and fight alien creatures while searching for a way to survive and escape.

Progression is linear and divided into tightly designed scenes rather than selectable stages. Lester later obtains a pistol with different functions, including firing, creating protective barriers, and charging shots. Death is frequent, but restarting a scene allows the player to learn enemy patterns and puzzle solutions.

Observe before acting. Many hazards are placed just outside the visible action, so advancing cautiously and testing enemy behavior is safer than running forward.

Use the pistol deliberately: the normal shot handles exposed enemies, the force field provides temporary protection, and charged shots can break through barriers or defeat stronger threats. Remember scene passwords when restarting after a failed attempt.