Secret Quest

It started with one station, then three, then eight. If something is not done, the aliens will overrun the Earth. It's up to you to destroy the stations by activating their self-destruct. You move from room to room and fight all the enemies you encounter. When you defeat an enemy, you will receive an energy capsule or an oxygen bottle. When you fight aliens, you consume energy and/or oxygen, so kill quickly. Each weapon deals a different amount of damage and consumes a different amount of energy. As a rule, the more powerful a weapon is, the more energy it consumes. You also consume one bottle of oxygen per minute during your explorations. Along the way, you will sometimes find sonic keys, an energy sword, a sonic blaster or a particle beam. Sonic keys are required for certain doors, which you will find in later stations. Once you have set the self-destruct code, a clock starts and you have to make it to the teleporter before the time runs out. The game ends if you destroy all eight stations, run out of oxygen or fail to leave a station before it self-destructs. If you run out of energy, the game does not end, but you cannot use weapons, kill monsters or refill oxygen. Therefore, the game will not last long if you run out of energy.