Dungeon Defender is a real time strategy defense hybrid. You are the dungeon overlord and swarms of heroes are invading your lair and attempting to steal your gems. You must stop them by building creature lairs, traps, and sending your avatar out to defeat them. Dungeon Defender. Pick from 5 avatars each with a unique creature and trap. Work your way down the talent tree picking upgrades for your avatar, minions and traps.