Deep under the ground there is a dungeon, where a terrifying monster lives. Everything was fine for him, until he saw humans trying to destroy his Doom Chest. Don't let them come closer, kill them, eat them and place various traps to defend your precious!
Every monster game has the same scenario. You have to kill various monsters attacking you or your land. But how about changing sides? Pick your own monster and wait for humans in your dungeon. Defend the Doom Chest, the major thing what they came for. Don't let them destroy it and kill everyone that will come closer. Place various traps and spend money on upgrades!