UnderDark: Defense

Contains ads
4.6
70.5K reviews
Content rating
Rated for 7+
1M+
Downloads
Content rating
Rated for 7+
Mild 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 ā­ļøā­ļøā­ļøā­ļøā­ļø:

"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
Jul 7, 2026
Available on
Android, Windows*
*Powered by Intel® technology
Events & offers

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

4.6
68.7K 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.
10 people found this review helpful
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LiberalDust
March 13, 2026
Hello, this is the Underdark Development Team. We’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.
19 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
jake robins
September 16, 2024
So I've played this game for about a month now, it's had it's ups and downs. The upside things is that the art, the macabre theme, and the tower designs are all very cool. The grid tower placement and designing our paths around the objects also adds to the uniqueness of the game. The big downside is the difficulty. It started as an easy game for about 20 levels. Then, as it balanced on difficulty for about 10 levels, it then got ridiculously hard after level 30, and can't get further
23 people found this review helpful
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What’s new

3.2.9 Update Notice

- Equipped heroes, towers, pets, and items now apply their actual levels and bonus options in multiplayer co-op.
- Fixed an issue where the Daily Co-op/Guild Co-op lobby loadout could differ from the actual in-game loadout.
- Fixed pet drop rate effects being incorrectly described as item drop rate effects on some screens.
Content rating
Rated for 7+
Mild Violence
In-Game Purchases (Includes Random Items)
Learn more

App support

Phone number
+821031036858
About the developer
ģ •ģŠ¹ķ˜ø
Libertydust@gmail.com
ģ‹œķ„ė™ ģ°½ģ—…ė”œ 18 807호 ģˆ˜ģ •źµ¬, ģ„±ė‚Øģ‹œ, ź²½źø°ė„ 13449 South Korea

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