Games like Earth Defense Force 4.1: Mission Pack 2 - Extreme Battle

If you finished Earth Defense Force 4.1: Mission Pack 2 - Extreme Battle, the closest matches are Serious Sam: The First Encounter, Zone of the Enders: The 2nd Runner, Ranger X, Alien Rage: Unlimited and Ghost in the Shell: Stand Alone Complex - First Assault Online. All 7 share its shooter genre and are ranked by how closely their themes and modes overlap.