The aliens have returned, you must return to re-exterminate them. 

Defeat the strongest aliens , collect perks to become absurdly powerful and the strongest alien-exterminator.  You are on a hostile planet, with a dangerous environment seek shelter and Beware of the Storm.

Each rooms leads to three doors, some doors lead to more difficult rooms. However the greater the challenge, the greater the reward.

Controls:

WASD - Movement

Space - Dodge

Left Mouse - Shoot