The game focuses on weapon and upgrades for the MASS as players advance, gather materials and complete missions.

Players man a M.A.S.S and they must fight against creatures called Quarks, as well as commanding their own organisation.

The game features over 38 different mech parts to assemble and customize with virtual paint and decals.

On its release, MASS Builder was met with "positive" reviews from critics.

It immediately grounds the player into a story befitting for Mecha games.