Games like Astro Smash 'n' Blast!

If you finished Astro Smash 'n' Blast!, the closest matches are Synduality: Echo of Ada, Concord, Serious Sam: The First Encounter, Alien Rage: Unlimited 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.