The mobile tower defense spinoff gets a fuller soundtrack than Defense did. "Main Theme from Metal Slug Attack" carries the franchise banner. "To the Front" scores the world map with forward momentum. The mode-specific themes give each gameplay type its own musical identity: "Rescue" for P.
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O.W. mode, "Tactial Situation" for team battles, "Militancy" for guild operations. "Regular Army Base" and "Rebel Army Base" split the factions musically. "Invasion" scores the enemy encounters. "United Front" brings cooperative energy.
For a mobile game that ran for years, having dedicated music for each mode shows real care. If you sank hours into Metal Slug Attack on your phone and the music became ambient background, hearing it isolated reveals more craft than you'd expect.