The planet is almost completely overrun by an unknown alien race, 
all our forces are down, our ground and air vehicles, automatons and drones are hacked under enemy control 
and drones are hacked under the control of the enemy, we have the technology to take down their defenses 
technology to take down their defenses but they regenerate over and over again, all we have left is the new experimental cannon that in desperation 
experimental cannon that in desperation mankind has created, an ultimate weapon to destroy their mothership, but
destroying their mother ship, but the convoy that transported the energy capsules that feed it was assaulted 
but the convoy carrying the energy capsules that feed it was assaulted by the enemy, we managed to defeat one of the ships, 
when destroying it the capsules were scattered by diverse zones, 
the other enemy vehicle managed to escape so some of them are in the invader's power. 
you are an experimental pilot designated to the RENENZAITER project, 
a prototype of armored tank with plasma cannon and retro thrusters to be able to access difficult 
difficult areas (jump), you are the last survivor of the military complex where you are, an armored bunker 
where you are, an armored bunker now under enemy control, the rest of us have evacuated along with the 
evacuated along with the wounded, your mission will be to pilot the RENENZAITER and collect all the capsules needed to 
all the capsules needed to activate the weapon and destroy their mother ship, 
collect all the ones you find in the bunker and its subways, search for all the capsules scattered in the 
capsules scattered in the attack and finally breaks into the alien facilities to recover the stolen 
to recover the stolen capsules, remember, it is not enough to defeat the enemies, 
your mission will not be finished until you find all the capsules needed to activate the weapon, to 
to activate the weapon, to open your way you will need access cards (blue doors), 
the first ones we have left at hand, the rest you will have to find them yourself, 
in other cases you will have to defeat all the enemies of a room to open the doors (red doors) and 
the doors (red doors) and don't forget to collect the batteries to regenerate and reinforce the RENENEN's 
reinforce the RENENZAITER's armor.

Good luck, you are the last hope of humanity ....