METAL SLUG 3 is a side-scrolling run-and-gun built around direct controls and detailed pixel art. Its arcade Main Mission sends players through five challenging stages, where branching routes open onto different areas and large boss encounters punctuate the firefights. The appeal is in balancing the series’ straightforward action with stage routes that invite exploration.
The game also separates replay and co-op into distinct formats. Mission Mode lets players revisit unlocked stages, either alone or with a companion, while Online Mission connects friends for cooperative mission runs.
Beyond the missions, METAL SLUG 3 includes configurable display, control and language settings, an illustration gallery, and leaderboards for comparing ranks and scores. Its play formats make room for both individual practice and shared runs, while the branching stages and boss fights keep the focus firmly on arcade-style action.