Minotaur

2897, OCTOBER 1 - DAY OF WEEPING
A vast fleet of dark battle cruisers appeared in the sky and drained fire on a peaceful, defenseless Earth. What is left of humanity has gone underground where the survivors put their hope in MINOTAUR - humanity's final defense. For if the Klein converter is destroyed, there will be no stopping the alien onslaught...
The object of the game is to defend the glowing Klein converter from enemies. Tanks will attack, three at a time. Destroy all tanks to advance to the next level.
Protect the Klein converter at all costs! You have an endless supply of MINOTAUR tanks to defend the Klein converter, though each time your tank is killed, it will take longer to regenerate. The only way to lose is for the Klein converter to be vaporized by cannon fire. It is better to sacrifice your tank than to lose the game.
The maze can be destroyed by cannon fire, but will be regenerated between levels. However – the walls are helpful in setting an ambush and protecting the Klein converter – don't shoot them indiscriminately! Power-ups provide a burst of speed, but they will be destroyed if struck by cannon fire, so grab them quickly!