Defend yourself against hundreds of enemies with a blast from your mega laser cannon.
Here, you control an outpost. A lone cannon which can fire in any direction. Unfortunately you only have one power-blast which, on the plus side, you use to mow down 20+ enemies at once. Enemy ships continue attacking in an almost Brannigan-like strategy, leashing wave upon wave of robots until you can't sustain any more damage, and just die.
The thing about dying is this: While not shooting, your shield is up and nothing can hurt you. If you do shoot, you become vulnerable, but you can shoot the enemies bullets with your laser, meaning you can survive for a while without getting injured. After a while, though, the enemies come in greater numbers and it may not be so easy to protect yourself from all sides.
The repairs of 10% per round at first seem excessive, then desperately needed and seemingly too spread apart as the game progresses. Limiting you to only one weapon - which itself contains limitations - opens up some surprisingly frantic white-knuckle moments as you attempt to swing around and thwart the enemies. This one comes recommended.