It is an Action game. Basically it is a Tower Defense game. In Left side of the game Hero (User/Gamer) is there, and from Right side Monster will be coming one by one. Hero has to kill all the monster to go to the next round. Hero can use 5 categories of Firing weapon
1) Primary Weapon (Revolver type gun)
2) Secondary Weapon (Automatic machine Gun)
3) Special Weapon (RPG, Rocket Launcher)
4) Grenade
5) Unique Weapon (Nuke, Artillery etc.)
The game has lots of action to enjoy.