Games like Starship Troopers: Extermination

If you finished Starship Troopers: Extermination, the closest matches are Serious Sam: The First Encounter, Serious Sam 4, Transmissions: Element 120, Brutal John 2 and Ghost in the Shell: Stand Alone Complex - First Assault Online. All 10 share its indie genre and are ranked by how closely their themes and modes overlap.