UnderDark: Defense

Contains adsIn-app purchases
4.4
68.2K reviews
1M+
Downloads
Content rating
Everyone
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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
Mar 21, 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
66.5K reviews
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.
40 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 issues—we're working on improving its stability. We'll also look into simplifying the post-level menus for a smoother experience.
Jesse Ray
March 4, 2025
Overall it's a great game. Just on the game alone, I would rate 5 stars. I have it at 4 though since there are red blips everywhere that you can't remove after clicking on them, each one is for you to see the multiple microtransactions all across the screen instead of maybe just 1 red blip on the shop icon. Other issue which is minor, the name taken feature, so many people play games and take the good names then quit so those are forever gone.
29 people found this review helpful
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Saint “Fu”
May 22, 2025
update down to 2* from 3. unplayable at higher levels. less than 1 frame per second. additionally, some things don't work as text suggests. for example, Living Tower hero at level 3 gets "one of each equipped tower at start of game" and this has never happened (and is why I focused on getting this hero, so a big let down). please fix things because the game was fun when I could play.
18 people found this review helpful
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LiberalDust
May 19, 2025
Thank you for the thoughtful feedback. We're happy you enjoy the core tower defense experience. We're aware of performance issues at higher levels and are working to optimize gameplay even on high-end devices. Your input is invaluable.

What’s new

[Underdark: Defense] Update
- New Content: 4 new towers added
- New Dungeon: Ranking dungeon “Silkmoth That Learned to Fly” added
- New Pass: Limited tower pass added
- Co-op Dungeon: Stage 1 difficulty reduced
- Bug Fix: Fixed issue where Buff Reset +1 did not stack