Derp is a dynamic, atmospheric shooter in representatives of this classic genre. Aliens have come from the Cosmos and invaded your base. Their goals are vague, but they are clearly hostile. Everyone on the base but you has been wiped out. You're alone. Hundreds of monsters with big guns and reckless drive are after you. There are 3 types of weapons: machine gun, shotgun and rocket launcher. Great graphics and animation, paired with dynamic music will allow you to plunge into this dangerous world just like the good old days.