Underdark:Defense

Underdark:Defense

Tactical Tower Defense

4K ratings
824 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • July 2, 2024
  • August 15, 2026

Features

Underdark:Defense screenshot #1 for iPhone
Underdark:Defense screenshot #2 for iPhone
Underdark:Defense screenshot #3 for iPhone
Underdark:Defense screenshot #4 for iPhone
Underdark:Defense screenshot #5 for iPhone
Underdark:Defense screenshot #6 for iPhone
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About

Defend the Eternal Flame from relentless dark forces in this tactical tower defense game. Strategically place towers, choose buffs, and level up your heroes to forge an impenetrable defense. Enjoy one-handed gameplay for strategic fun anytime, anywhere.

Defend the Eternal Flame
One-handed gameplay
Customize defense strategy
Level up and choose buffs
Hero abilities and enhancements
Earn trophies
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What users say

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What's New in Underdark

3.3.9

August 15, 2026

3.3.9 Update Notes - PVP Dungeon 2 has been added. - Fixed an issue where clear rewards were not granted when completing another dungeon after playing a PVP Dungeon. - Fixed an issue where the hero joystick did not work in PVP Dungeons. - Improved overall game stability. - Fixed an issue where the Mount Package was not displayed. - Fixed an issue where monsters could not be defeated after Stage 900.

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In-App Purchases

$0.99

Event Package 1

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Events

Read more about Ниндзя и Самурай: мега-бафф!

Ниндзя и Самурай: мега-бафф!

Копите Теневые метки = взрыв 2000% урона!

Jul 1, 2026 Jul 31, 2026

Read more about Жнец и Акула обновлены!

Жнец и Акула обновлены!

Два героя полностью обновлены! Проверьте сейчас!

Jun 2, 2026 Jun 30, 2026

Read more about [외계 비행선] 신규 등장!

[외계 비행선] 신규 등장!

레이저와 블랙홀로 몬스터를 섬멸하는 신규 캐릭터!

May 1, 2026 May 31, 2026

User reviews

Suprisingly a very addicting and fun game

Couple things to go over.

1. Normally tower defense games are idle and very boring. This is not one of those games, you actually get to do stuff and theres some thinking involved.

2. No forced ads or pay to play. Pay to win not really like you can pay but you really dont need to. Like there is pay to win but not by much as you can totally play without spending a single penny.

3. The gameplay is pretty addictive. You really get into it and trying to win is pretty hard sometimes. I like the crows nest i highly recommend using that when you get it.

4. Its not a perfect game dont get me wrong it has some questionable things and annoying small parts.

For example, the swapping and discarding gear is kinda unnecessary. It would be better just to swap out the lower tier gear for the higher ones. Another shady ish thing is the mulitplayer as i dont think they are real people and it takes decently long to find a match. I could be wrong or they could be all korean or chinese players but idk its a lil sus.

I think in terms of mobile games this game is definitely top tier i highly recommend
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Mount package

Still cant see in game….. even with update. Pls fix asap.

Typical gacha game

Uninteresting upgrade paths, uninteresting gameplay with little skill involved. Every facet of the game has pay to win or watch an add: make the game move faster, unlock more towers, heroes, and items through loot box gambling, and a pvp element to entice you to spend more than your friends. Don’t waste your time.
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Crashes many times a day

Game needs update and fix, been crashing a lot over past week.

Update: 2 months later and still crashing every day!!

Fix the memory issues please.

同じタワーでマンネリ化

内容としては面白いです。しかし、毎回アイテムの効果を石を使ってコロコロ総入れ替え出来る訳でもないし、特定のタワーだけを使うようになります。そして、マンネリ化。1dayランキングしかやらなくなります。1dayランキングのシステムのゲームが毎日10種以上やれるならサブスクで500円ぐらいならお金も出すのに。普段の900階以上のダンジョンとは別に、1dayランキングのシステムのダンジョンも沢山作って欲しいです。

Developer apps

Featured on

User experience

🐞

Reported Bugs

3 issues

Goblin tower factory causing game slowdown

Bug

Consecutive login rewards reset after updates

Bug

Invisible towers in multiplayer

Bug

Requested Features

5 requests

Ability to rotate towers

Feature

Move towers after placement

Feature

More enemy variety and animations

Feature

Improved co-op mode

Feature

Simplified progression system

Feature

FAQ

What is Underdark: Defense?

Underdark: Defense is a tactical tower defense game where players defend the Eternal Flame from waves of dark forces. It involves strategically placing towers, choosing buffs to enhance defenses, and leveling up heroes with unique abilities.

What are the key features of Underdark: Defense?

Key features include defending the Eternal Flame, one-handed gameplay for accessibility, customizing defense strategies with buffs and tower placement, leveling up heroes, and earning trophies to enhance your guardians.

Is Underdark: Defense free to play?

The game is free to download and play, but it offers in-app purchases. This means you can enhance your experience or progress faster by buying items or currency within the app.

Who is the target audience for this game?

This game is designed for players who enjoy strategic gameplay, particularly tower defense enthusiasts. It's also suitable for those who appreciate hero customization and a game that can be played conveniently with one hand.

What is the main objective in Underdark: Defense?

The primary objective is to prevent the dark forces from reaching and extinguishing the Eternal Flame. Players achieve this by building and upgrading defensive towers, utilizing hero abilities, and strategically selecting growth buffs.