Underdark:Defense

Underdark:Defense

Tactical Tower Defense

4K ratings
825 reviews
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • July 2, 2024
  • September 14, 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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+1

What's New in Underdark

3.3.11

September 14, 2026

■ New: Item Awakening Awaken God grade equipment up to Awakening 5. · Use items of the same type from Storage as materials — 1, 2, 4, 8 and 16 per stage (31 in total). · Awakening always succeeds, and your item level and bonus options are kept. · The main option grows up to 5× its original value, and each item's unique effect grows stronger at every stage. · An awakened item can only be replaced by one of the same type and grade, and keeps its awakening level. ■ New: Friends · Add up to 30 friends by exact nickname search or from the suggested list. · Send free Diamonds to friends once a day each — the recipient gets 1 to 30 Diamonds. · Gifts can only be claimed on the day they arrive (KST). ■ Friend Roulette Event · Earn 1 roulette ticket every time you claim a diamond gift from a friend. · Spin for Gold, Keys, Diamonds, Embers and more. Spin 10 is supported. · Milestone rewards from 30 up to 300 total spins, including a Legendary Hero, Legendary Tower, God grade item, random Skin and a Unique Mount. · Runs until September 30 (KST). ■ PvP Season 3 — Boss Counterattack Every 5 waves, send one of three bosses to your opponent's side. The chance is shared and does not stack. · Shapeshifter — changes the type of all towers · Destroyer Lord — destroys 4 random towers · Herald of Frenzy — while alive, all monsters move 25% faster New season score rewards and a new season shop are open, and rankings and purchase limits have been reset. ■ Improvements and Bug Fixes · If Co-op Dungeon stops progressing, you are now notified and returned to the lobby. · Chain towers now also link with teammates' towers in Co-op Dungeon. · Co-op room codes now accept codes containing letters and numbers. · Fixed incorrect pricing when buying item boxes in bulk. · Fixed rewards being lost when an error occurred while claiming all mail. · The Medusa map curse now triggers every 2 waves instead of every wave. · Fixed damage numbers not being shown at low FPS.

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In-App Purchases

$0.99

Event Package 1

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User reviews

Fun game

Really fun games

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.

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.