Alien Hominid is a side-scrolling shooter in a similar vein to games such as Metal Slug, where one hit instantly kills and has a two-player simultaneous play. Players take over as the titular hominid, who has to fend off waves of secret agents. His main arsenal is a blaster, while players can also melee close-up enemies and use a limited number of grenades to attack. Advanced moves include rolling under shots, jumping on and biting off enemies' heads, temporarily scaring other enemies, and digging underground to drag enemies down with them.