UNDERDEEP is an idle RPG that lets you dive deep into dungeon exploration and mapping, set in a gritty, immersive fantasy world. Blending the charm of classic RPGs with modern idle mechanics, it offers a rich and thoughtful gameplay experience.

Character Creation

Your journey begins by creating your own character. Name them, select a visual style, and enter a world of adventure with the one who represents you.

Job System

You’ll begin as a Newbie, a complete beginner. But as you gain experience, you can evolve into a wide range of roles—warrior, rogue, ruler, or crafter. Experience a highly flexible job system where your growth determines the path you take.

Mapping

At the heart of dungeon exploration lies mapping. Locations are automatically recorded as you explore, and you can place your own custom markers to keep track of important spots. Your observation and note-taking skills are the key to successful expeditions.

Over 500 Unique Items

Weapons, armor, accessories, and more await deep within the dungeon. Use your gear strategically to challenge increasingly dangerous and rewarding areas.

Skill Customization

Build your own strategy with unique skill combinations. Some skills can synergize dramatically, amplifying your power. Craft your ultimate build and conquer the depths your way.

Idle-Friendly Exploration

Whether you prefer hands-on control or automation, you can choose between manual or auto actions during exploration. Set your strategy beforehand, and your character will continue adventuring even while you're away. Perfect for busy players who want to keep progressing.

Light Asynchronous Multiplayer

You might encounter characters created by other players inside the dungeon. Customize your “dialogue” and “behavior” settings to prepare for these spontaneous meetings. Enjoy a relaxed, asynchronous multiplayer experience that lets you connect without pressure.

Karma System

Your behavior in the dungeon affects your character’s karma. Will you walk the path of light—or descend into darkness? The choice is yours.

------ Prologue ------

In the deep forest near the royal capital, a mysterious dungeon infested with monsters opened its maw. The first to venture inside was a nameless man. He returned drenched in blood, clutching an armful of gold. Word spread like wildfire, stirring the hearts of all who sought fame and fortune. Sword-bearing mercenaries, knights in pursuit of glory, and reckless adventurers made their way into the forest one after another. It was said that deep within the dungeon lay a treasure powerful enough to shake even the throne itself. ―And now, you too stand at its entrance. Will you seize your destiny, or be swallowed by the darkness? Your story begins here.