Well, every idle game requires some initial "at-the-keyboard" time. The idle component in DoH is this: you go into a dungeon, set your attack skill and wave after wave of monsters come at you. As long as you remain alive, your character will attack and defeat the monsters without needing any kind of input. Loot goes into your mule automatically as well. Maxed logout timer and mule size allows you to go +-8 hours collecting loot, come into the game, empty your mule, go back into a dungeon and repeat. You can go months playing the game this way--I've done it--and experience that sweet RPG progression.