Nuke Defence is an adventure war game. Monsters are attacking you must traverse your kingdom fighting away the monster threat. Use skills to kill the monsters, after killing a vast number of foes collect the goods they drop and improve your three primary skills or learn brand new ones from one of the four major areas be it passive, fire, cold or earth. You can only have three of the non-passive abilities in use at any one time if those abilities are not enough, buy artefacts which will aid you in battle from dwarven boots to an arcane tome plus many more.
Use WASD to move, 123 to select your weapon and your mouse to place your attacks and shoot the monster invaders. F opens your skills options.