As a Station flies into a mysterious nebula, most of robots go insane - they unite into cults worshiping Perfection, or unknown God, or Great Toaster, whatever. The less sense it makes - the better.

Some robots however were on maintaince, so they stayed normal.
You take control of one of such machines and try to take down these robo-cults before they ruin the Station and get us all vanished for good.
You can only move from wall to wall, so plan your maneuvers while shooting mad cans.
Find the equipment to shoot big bad ball of whatever kills the enemies, or just keeps you a few seconds longer in your struggle.