Idle Dungeon is a pixel art auto-battle RPG where your heroes fight through 200 dungeon floors automatically. Spend gold on five upgrades (Attack, Defense, Health, Speed, and Critical chance) to make your hero stronger. Collect equipment drops with five rarity tiers from Common to Legendary. When you reach floor milestones, you can Rebirth to reset progress but gain permanent gold multipliers and powerful perks like new hero classes, equipment retention, and auto-healing. The game saves automatically and earns gold while you are away, making it perfect for daily check-ins. Four dungeon zones (Dungeon, Forest, Volcano, Abyss) each introduce new enemies and bosses with unique pixel art sprites. Complete daily quests for bonus gold and fill the monster compendium by defeating every enemy type.