UnderDark: Defense

Contains adsIn-app purchases
4.4
69.6K reviews
Content rating
Everyone
1M+
Downloads
Content rating
Everyone
Mild Fantasy Violence
In-Game Purchases (Includes Random Items)
Learn more
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About this game

Over 2 million downloads! The strategy game that's captivated tower defense fans around the globe!

Your mission is to defend the camp from the unidentified enemies lurking in the dark dungeon.
Place towers strategically and choose buffs to grow stronger.
Always stay prepared, because your enemies will only grow stronger!

[UnderDark : Defense] is a tower defense game that delivers strategic fun with simple one-handed controls, anytime, anywhere.
Whether you're new to tower defense or a seasoned fan, you'll never want to let go once you dive in.

Step 1: Place towers and block the monster's path.
Step 2: Choose one of the three buffs and plan out your strategy.
Step 3: Have fun with the new characters, towers, and in-game content updated every two weeks!

Reviews from players around the world โญ๏ธโญ๏ธโญ๏ธโญ๏ธโญ๏ธ:

"The best tower defense game" - dani*****

"This is the first time I've ever left a game review. That's how fun it is!" - dark****

"Love that it actually makes you think, unlike the other defense games" - flow****

"Super fun to play with different maps and builds every time" - Keit****
Updated on
May 20, 2026
Available on
Android, Windows*
*Powered by Intel® technology

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Location, Financial info, and Device or other IDs
Data is encrypted in transit

Ratings and reviews

4.4
67.9K reviews
Lysias Leviathan
April 27, 2026
3/12: 2* Way too many overpriced micro transactions. There's 2 battle passes for 1 season. Lots of text is incorrect. For example, pet combination says 2 pets but actually takes 4. Prop combination says it takes 2 pets... and there's an energy mechanic. So much wasted potential for the actually enjoyable tower defense part of the game. 4/27: 1* Still no fixes. Also the silkmoth mode is almost unplayable. The load icon for unlocking towers gets bigger each time until it blocks the entire screen.
7 people found this review helpful
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LiberalDust
March 13, 2026
Hello, this is the Underdark Development Team. Weโ€™re sorry the microtransactions and incorrect descriptions caused frustration. Issues like incorrect pet/prop combination text will be reviewed and corrected. Thank you for the feedback. E-mail: libertydust@gmail.com
Jason Skumanich
April 12, 2026
Edit from 5 stars to 1. Once the light processing plant is unlocked, you have to watch an ad to play the map. No. no no no no. You are not going to get away with forced ads and expect a good review. I've watched countless ads on my own volition because I enjoy the game, and the reward boosts are a qol feature. When you force advertisements, you essentially admit your intention. Ads are not a core gameplay mechanic of any good game. Final review? 1/5.
11 people found this review helpful
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LiberalDust
May 11, 2026
Hello, this is the Underdark development team. We apologize for the frustration caused by the advertisement system. Your feedback regarding forced ads and gameplay experience will be carefully reviewed as we continue improving the game environment. E-mail: libertydust@gmail.com
M A
May 12, 2025
This is a great game, but multiplayer doesn't work no matter what my friend and I try, and playing with friends is the only reason he dled it. Had to knock off a star for that. Other than that disappointment, the game is fun and I love how many different towers, heros, and weapons there are to choose from to make the gameplay not just dumb luck. I wish I didn't have to go through so many menus after every level to collect all the perks. That's pretty annoying.
46 people found this review helpful
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LiberalDust
May 21, 2025
Thanks for your thoughtful feedback! We're glad you're enjoying the strategic variety. Sorry about the multiplayer issuesโ€”we're working on improving its stability. We'll also look into simplifying the post-level menus for a smoother experience.

Whatโ€™s new

[UnderDark: Defense] May Update
- Alien Spaceship & Joker balance improvements
- New auto option feature added
- Detailed stat calculation info added
- Fixed unlock icon issue in Silkworm Moth Dungeon
Content rating
Everyone
Mild Fantasy Violence
In-Game Purchases (Includes Random Items)
Learn more

App support

About the developer
์ •์Šนํ˜ธ
Libertydust@gmail.com
์‹œํฅ๋™ ์ฐฝ์—…๋กœ 18 807ํ˜ธ ์ˆ˜์ •๊ตฌ, ์„ฑ๋‚จ์‹œ, ๊ฒฝ๊ธฐ๋„ 13449 South Korea

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