A sixty-floor skyscraper is occupied by an enemy organization. You were sent as a police unit to clear the building from the enemy. Defeat the enemies from the top floor and descend to the lower floors. There will be killers at every level of the building who will be stronger and there will be always more and more of them. When you passed the mission on the floor, you'll receive reward- pills for health or money. You can buy new weapons, armor or improve character stats for the money. What strategy will you choose? Are you going to be a killer with melee weapons or with distance weapns? Have fun.