Baal uses a side-view perspective. The objective is to travel through connected underground areas, find routes through the complex, destroy enemies, collect useful items, and ultimately prevent Baal's plan. Rooms contain platforms, barriers, hazards, and enemy placements that require both shooting and precise movement.

Progress depends on learning the layout and managing survivability rather than simply moving from left to right. The player advances by exploring branching passages, overcoming obstacles, and reaching deeper sections of the facility. Mistakes can be costly, so cautious movement and memorizing dangerous areas are important.

Explore methodically and remember the position of branching routes, hazards, and enemy ambushes. Rushing into unfamiliar rooms often causes avoidable damage.

Use attacks deliberately, keep moving around enemies when possible, and treat every new area as a pattern to learn. Repeated attempts are often necessary to identify safe routes through the complex.