Underdark:Defense

Underdark:Defense

Tactical Tower Defense

4.1K ratings
833 reviews
Free
In-App PurchasesWith Ads

Details

Released
July 2, 2024
Updated
October 15, 2026

Features

Underdark:Defense video #1 for iPhone
Underdark:Defense screenshot #2 for iPhone
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Underdark:Defense screenshot #6 for iPhone
Underdark:Defense screenshot #7 for iPhone
Underdark:Defense screenshot #8 for iPhone
Underdark:Defense screenshot #9 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 about Underdark

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What's New in Underdark

3.4.2

October 15, 2026

• Guild Raid • Goblin Camp: 20 stages • Mount catalysts • PvP Season 4 — 2026.10.16 00:00 KST • Improved mount enhancement guarantees, Blue Moon protection, and gauge animations. • Scrollable personal records and increased stage 11–12 rewards. • Improved Guild Raid UI, button touch targets, and click sounds.

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Subscriptions & In-App Purchases

$0.99

Event Package 1

Get Event Package 1

Events

Read more about Guild Raid: The Final Boss

Guild Raid: The Final Boss

Build your defense. Take on the final boss.

Oct 14, 2026 — Oct 29, 2026

Read more about October Heroes Rise

October Heroes Rise

New season, stronger heroes and reworked chat

Sep 30, 2026 — Oct 31, 2026

Read more about Gear Awakening

Gear Awakening

Awaken God-tier gear through five stages.

Sep 15, 2026 — Oct 15, 2026

User reviews

Is this even a game???

Stupid

Freunde, toll

Schön, dass Freunde eingeführt wurden, aber warum zum Teufel muss ich jedem Freund einzeln Geschenke schicken? Wär schon korrekt, wenn man allen gleichzeitig Geschenke schicken kann

Fun at first

Super addictive at first but becomes pay to win pretty quickly. Constantly trying to get you to buy things

Horrible customer service

I never write reviews but my experience dealing with under darks customer service was so frustrating that I felt compelled to give them a one star and write a bad review. The reason I contacted customer service was because my phone was broken and I had no way to get back into my account on a different device. So I emailed UnderDark and gave them the name of my old account. They said they couldn’t find it but if I provided receipts of purchases I’d made they could locate my account. I then also sent them those receipts totaling in about $73. After waiting for days to receive a response it never came. So I sent email after email only to be completely ghosted. How disappointing that you can spend money on one of your favorite games only for the team to not give a damn about you. Don’t spend your money here it’s better spent on any other game.
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I loved the game but lost everything

I played this game for hours and even put some money into it but then one day I logged in and everything was gone, like $15 worth of extra add-ons and equipment and days of progress all just deleted and I’m stuck at level one, even logged back into my account and it’s the same way. Genuinely devastated.
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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.