UnderDark: Defense

Contains adsIn-app purchases
4.6
67.2K reviews
1M+
Downloads
Content rating
PEGI 7
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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 ⭐️⭐️⭐️⭐️⭐️:

"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
Feb 2, 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
65.5K reviews
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
19 people found this review helpful
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Star Cheeto
August 21, 2024
Has me hooked as one of the best tower defence games I've played. A great mix of towers, gear, pets, and characters to vary up how you approach any level. I would like to see load-outs in the future to make build switching a little more convenient. The price of removing ads is good. You can pay for a boost in various ways but the gameplay imo hasn't been sacrificed for those systems. You can get great towers, gear, etc in a in just a bit of play and overcome challenges with experimentation.
39 people found this review helpful
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LiberalDust
August 23, 2024
Thanks for review! 😍😍
Oskar P
October 16, 2024
The game is great, but not the monetization. If you like tower defence &/or RPGs, you will enjoy the game. You don't just build towers, but you also control a character. However, after about the 20th stage and 10th special stage there's a difficulty spike. A more advanced game that you buy and play without microtransaction would cost 10-15$. Here removing ads is over 8€ and speed up function 5€. But that's far from enough to advance. If these 2 together were 8€, I'd consider it.
55 people found this review helpful
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What’s new

[Underdark: Defense] February 2 Update
- Fixed an issue where players could not enter Daily Dungeon Multiplayer mode
- Fixed an issue where the Daily Dungeon Multiplayer ranking UI was displayed incorrectly
- Fixed an attack speed–related issue in Daily Dungeon Multiplayer mode
- Balance adjustment: Gamblewood has been nerfed
- Gamblewood Lv.6 ability adjusted (Max 2000% → 500%)