Half Life

Valve's Half-Life broke from the arena-shooter norm of its era by never cutting away from Gordon Freeman's perspective, no cutscenes pull the camera away, every story beat and set-piece unfolds in first person exactly as you're experiencing the fight for survival at the Black Mesa facility.

Because encounters are built around the facility's actual layout rather than open arenas, using doorways and corners to fight enemies one at a time tends to work better than standing in an open room and getting surrounded. Environmental hazards, exposed wiring, unstable scaffolding, are frequently a faster way to clear a tough enemy than direct gunfire, worth watching for before committing to a straight firefight. Krunker.io offers a much faster-paced, arena-style FPS if you want a shorter session between longer games.