# Defense Legend 4: Sci-Fi TD — The Best Tower Defense game

> Sci-fi tower defense game with strategic base defense against enemy forces. (iPhone/iPad app by Nguyen Hieu.)

- Source: https://appshunter.io/ios/app/defense-legend-4-sci-fi-td/id1588331753 (this page in markdown: same URL + `.md`)
- Developer: [Nguyen Hieu](https://appshunter.io/developer/1771771597)
- Category: Games, Entertainment, Action, Strategy
- Price: Free with in-app purchases
- Rating: 4.40/5 from 86 App Store ratings · 31 written reviews indexed
- Age rating: 9+
- Requires: iOS 12.0 · 266 MB
- Languages: American English
- Released: 2021-10-12
- Data updated: 2026-08-25
- Monetization: free with in-app purchases
- User reviews in markdown: https://appshunter.io/ios/app/defense-legend-4-sci-fi-td/id1588331753/reviews.md

## What is Defense Legend 4?

- BRIFT STORY:
             In this part, the war between the Human and the Dark moved to a fierce new phase. In previous parts, Human found out the way to stop and defeat The Dark’s attacks. However, the Dark having cunning schemes always changes and develops after each of their failures. Battle in Defense Legend 4 is a maximum challenge for the followers of Defense Legend.
             The Dark will send a large and powerful army to attack fully to our strategic bases. They attack from all sides from the air, land and underground… Besides extremely modern weapons, the Dark also uses magic enhancing their strength to destroy Human’ bases.
- FUNCTIONS:
             Defense Legend 4 requests players to focus highly and give good strategies to defeat the Dark’s troops
        - Two heroes fight directly. Players are supported fully from the superhero team equipped more modernly. 
        - Upgrade strongly cannons, develop special skills.
        - Various territories such as deserts and forests and iced lands. Each kind of territories gives different challenges.
        - Various strategies such as air forces, land and underground…
        - A lot of modes

## Key features

- Strategic base defense
- Upgrade cannons and skills
- Diverse territories and challenges
- Varied enemy attack strategies
- Superhero team support

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Legend Package | $39.99 | one-time |
| Daily Sell 3 | $3.99 | one-time |
| Gold Pack 2 | $9.99 | one-time |
| up.max.superburn | $7.99 | one-time |
| box.reserve.defensex | $5.99 | one-time |
| defense.legend.x.unlock.smaugs | $9.99 | one-time |
| battlepass.elite | $3.99 | one-time |
| defense.legend.x.unlock.zita | $5.99 | one-time |
| FIRST TIME PURCHASE DISCOUNT | $1.99 | one-time |
| beginer.pack.1 | $1.99 | one-time |
| defense4.remove.ads.forever | $19.99 | one-time |
| defense4.money.ingame | $3.99 | one-time |
| defense.legend.x.shop.energy4 | $29.99 | one-time |
| unlock.laser | $3.99 | one-time |
| unlock.srocket | $7.99 | one-time |
| unlock.lightning | $7.99 | one-time |
| defense.legend.x.unlock.raptor | $7.99 | one-time |
| defense.legend.x.unlock.satt | $7.99 | one-time |
| unlock.machinegun.s | $1.99 | one-time |
| up.max.machinegun | $5.99 | one-time |


## Recent user reviews (10 of 31)

All indexed reviews: https://appshunter.io/ios/app/defense-legend-4-sci-fi-td/id1588331753/reviews.md

### 5/5 — good

*2025-02-26*

it’s similar to defense zone hd seris 
디펜스존 HD 시리즈와 유사함.

### 5/5 — 와우

*2024-12-29*

생각 보다 재미있네요

### 3/5 — Tower Defense thats pretty good

*2024-08-24*

As a TD game, its pretty good. There is a decent variation of maps and it requires active strategy to pass certain levels. Forced ads for certain things, but they are short not those 60 second ones. Only gripe is at some point you'll need to get better ships or towers to progress, but the IAPs are pretty pricy, spending $30+ on any game for not even the full set of unlocks is pretty ridiculous.

### 4/5 — Seems ok

*2024-07-31, version 1.0.68*

I like it ok

### 5/5 — Worth a try

*2024-03-02*

If you like tower defense games, I would say it’s definitely worthwhile to check this game out.  Good graphics, pretty good sound, and a lot of action!

### 5/5 — It’s fun

*2023-12-22*

I was able to get through the first few levels without having to spend money.  A lot going on in this game.

### 2/5 — Unausgewogen

*2023-10-24*

Die Grafik ist gut, die ersten Level sind auch gut spielbar. Aber schnell merkt man eine große Unausgewogenheit in dem Spiel. Die Türme bringen kaum etwas, sind teuer in der Aufrüstung und werden schnell von den Gegnern abgeschossen, statt dessen muss man mit den Helden extrem viel arbeiten und das hat wenig mit Taktik zu tun. Neue Turmarten muss man kaufen, wobei man das Geld besser in der Aufrüstung brauchen könnte. Alles in allem ganz nett, aber die Unausgewogenheit nimmt einem ganz schnell den Spaß weiter spielen zu wollen.

### 5/5 — So far, so great!

*2023-06-18*

Hope the difficulty graduates smoothly, without sudden extremes!

### 1/5 — Very fun game

*2023-05-24*

I like the game play. Very addicting game to play.

### 5/5 — Cool game

*2023-03-28*

I like this game!

## Frequently asked questions about Defense Legend 4

### What is Defense Legend 4: Sci-Fi TD about?

Defense Legend 4: Sci-Fi TD is a tower defense game where players must defend strategic bases against a powerful enemy force. The war between humans and the dark has escalated, requiring players to use modern weapons and strategic thinking to overcome enemy attacks from air, land, and underground.

### What are the key features of this tower defense game?

Key features include defending against diverse enemy strategies, upgrading cannons and special skills, utilizing a superhero team, and battling across various territories like deserts, forests, and icy lands, each presenting unique challenges.

### Is Defense Legend 4: Sci-Fi TD free to play?

Yes, the game is free to play. However, it does offer in-app purchases, allowing players to enhance their gameplay experience through optional purchases.

### What kind of strategies are involved in Defense Legend 4?

Players need to focus and develop good strategies to defeat the Dark's troops. This involves managing air forces, land units, and underground attacks, as well as upgrading defensive cannons and developing special skills for maximum effectiveness.

### What platforms is Defense Legend 4: Sci-Fi TD available on?

Based on the provided information, this is a mobile application. While specific platforms like iOS or Android are not explicitly mentioned, it is designed for mobile devices.

## Version history (last 5 releases)

### 1.0.112 — 2025-01-09

Graphics optimization

### 1.0.101 — 2024-11-01

Update SDK

### 1.0.68 — 2023-11-09

- Adjust balance to increase player experience
- Update App Privacy

### 1.0.66 — 2022-08-25

New Maps

### 1.0.58 — 2022-04-12

- Improved player experience.

## Apps similar to Defense Legend 4

| App | Rating | Price | Category |
| --- | --- | --- | --- |
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| [Rumble Rivals: Tower Defense](https://appshunter.io/ios/app/rumble-rivals-tower-defense/id1599244551) | 4.6 (1,184) | Free | Games |
| [Kingdom Rush Tower Defense TD](https://appshunter.io/ios/app/kingdom-rush-tower-defense-td/id516378985) | 4.8 (75,951) | Free | Games |
| [Crazy Kings Tower Defense Game](https://appshunter.io/ios/app/crazy-kings-tower-defense-game/id924907196) | 4.7 (1,867) | Free | Games |
| [Wild Sky TD:Tower Defense Coop](https://appshunter.io/ios/app/wild-sky-tdtower-defense-coop/id1474891914) | 4.8 (749) | Free | Games |
| [North Tower! Merge TD Defense](https://appshunter.io/ios/app/north-tower-merge-td-defense/id1626431061) | 4.7 (852) | Free | Games |

## More apps by Nguyen Hieu

- [Defense Legend 2](https://appshunter.io/ios/app/defense-legend-2/id1180077713)
- [Defense Legend 2 Ultra HD](https://appshunter.io/ios/app/defense-legend-2-ultra-hd/id1353283126)
- [Defense Legend 3: Furure War](https://appshunter.io/ios/app/defense-legend-3-furure-war/id1417881112)
- [King of Defense: Epic Battle](https://appshunter.io/ios/app/king-of-defense-epic-battle/id1473786035)
- [King of Defense Premium](https://appshunter.io/ios/app/king-of-defense-premium/id1530497871)

All apps by Nguyen Hieu: https://appshunter.io/developer/1771771597

## Related topics

[defense legend](https://appshunter.io/ios/topics/defense-legend) · [defcom td](https://appshunter.io/ios/topics/defcom-td) · [defense legend 2 ultra hd](https://appshunter.io/ios/topics/defense-legend-2-ultra-hd)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-25.*