A game of battling giant robots (Meks) and the pilots who ride in them (Mercs).

The rules describe nine pre-designed Meks. Players can also design their own Meks using the chassis, weapon, and other Mek systems specifications given in the rules. Mek pilots are individually rated for experience and skills.

The game is played on a 3x3 grid. Each square is marked with a terrain type as specified by scenario. The game comes with six scenarios.