Download Embark on a dungeon run and vanquish the invading Heroes!
You have been appointed as the Chief Dungeon Officer (CDO)!
Your ultimate mission is to ensure your dungeon's survival for as long as possible.
Take command of the Demon King and strategically deploy monsters to repel endless waves of heroic intruders!
ㆍOver 90 unique monsters
Each monster boasts distinct attributes based on its type, race, and battlefield role!
Summon the right monsters to create powerful synergy between their abilities!
ㆍDiverse items for strategic depth
Access more than 80 pieces of equipment to outfit your individual monsters.
Utilize over 30 different Totems to place in each of your dungeon's rooms.
Discover more than 90 powerful Relics that grant effects to your entire dungeon!
Select the optimal items to complement and enhance your chosen strategy!
ㆍDynamic random events
Experience more than 100 unique events, each with its own narrative.
Review upcoming events and formulate the most effective counter-strategy!
ㆍThe tide of dungeon warfare can turn in an instant
Invest in long-term research projects,
Employ Goblin Bandits to raid and compensate for scarce resources,
Command your Demon King to consume monsters and permanently increase his power,
Make critical decisions and witness their direct impact on the battlefield!
ㆍPermanent secondary attributes
Unlock incredible advantages that scale with your secondary attribute levels.
Acquire as many of these powerful bonuses as you can through gameplay!
ㆍPush past your limits!
Survive 50 years to complete the core game, then test your mettle in a higher-difficulty Challenge Mode!
As the difficulty escalates, challenging penalties begin to stack.
Prove your strategic prowess under the most extreme conditions!
ㆍEndless, competitive weekly mode
A competitive mode where you vie against other players without a defined end point.
Weekly rewards are distributed every Monday, followed by a rank reset.
Showcase your tactical skills under new, weekly-changing rules!
*The PC app player may experience issues. We recommend playing on a mobile device whenever possible.
What's New in the Latest Version 02.27.03
Last updated on Nov 6, 2024
CDO2: Dungeon Defense ver 02.27.03
- Bug fixes and general improvements.
CDO2: Dungeon Defense ver 02.27.02
- Bug fixes.
CDO2: Dungeon Defense ver 02.27.01
- General improvements.
Please refer to the in-game patch notes for detailed information.


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