The player explores first-person levels, defeats alien enemies, collects weapons and ammunition, and searches for key items or switches that open new routes. Levels emphasize interconnected spaces, hidden areas, elevators, doors, and environmental devices rather than a simple linear corridor structure.

Progression is organized by level and episode in the completed game, but the exact structure and available content depend on the beta build. Combat includes firearms, explosives, and situational weapons. The player can also jump, swim in suitable areas, interact with scenery, and use defensive items where supported by the build.

Conserve powerful ammunition for larger enemies and crowded encounters, and explore side rooms for supplies before committing to a major fight.

Check walls, switches, doors, and unusual scenery carefully. Beta maps may contain unfinished areas, missing progression cues, or unstable behavior, so preserve saves frequently and do not assume every apparent route is complete.