X

X is a mission based action game where the player controls a space tank on an alien planet. Its objective is to protect Earth from invasion by completing ten assignments with varied goals.

Gameplay involves navigating a surface overworld freely, though this exposes the tank to enemy patrols. An underground tunnel network provides an alternative route and opportunities to restore health and ammunition. The player must manage both a mission timer and the tank's shielding, with depletion of either resulting in failure. This creates a challenging pace.