メカアサルト offers players an immersive gaming experience set in a near-future world overrun by zombies. The game allows users to design their ultimate mech with over ten base options and more than thirty weapons, including chainsaws, flamethrowers, and laser cannons. The customization options are limitless, enabling players to tailor their combat strategies according to their preferences.

The gameplay features roguelike elements with dynamically changing maps and enemy placements for every session. Players face evolving zombie bosses, ensuring that each playthrough remains fresh and challenging. By defeating enemies, players can earn new parts to enhance their mechs further. Additionally, the guild competition adds a social aspect, allowing players to team up and climb global rankings for exclusive skins.