# Rat Killer Robot Invasion vs Alien Run

The clearest difference is rating: Rat Killer Robot Invasion at 4.6 against Alien Run's 2.3. Rat Killer Robot Invasion also leads on ratings volume (2K vs 3) and review sentiment (31% vs 6%). On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Rat Killer Robot Invasion sells 10 in-app purchases, starting at $4.99 per 7 days and Alien Run sells 10 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

Rat Killer Robot Invasion holds the better App Store score, 4.6 against 2.3. That said, the two scores are not equally well evidenced: Rat Killer Robot Invasion has 2K ratings behind it against 3, so its average is the more settled of the two. Written reviews point the same way: 31% of Rat Killer Robot Invasion's written reviews are positive against 6% of Alien Run's.

Rat Killer Robot Invasion ships an update every 10 days, Alien Run every 9 days. The most recent releases landed on November 3, 2026 and October 30, 2026 respectively.

## The numbers

| Metric | Rat Killer Robot Invasion | Alien Run |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (2K ratings)](https://appshunter.io/ios/app/rat-killer-robot-invasion/id6464372285/reviews)** | [2.3 (3 ratings)](https://appshunter.io/ios/app/alien-run-tentacle-attack/id6480405768/reviews) |
| Number of ratings | **2K** | 3 |
| Positive reviews | **31.1% of reviews** | 6.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | Yes | Yes |
| Update frequency | Every 10 days | **Every 9 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 353 MB | 132 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 9+ | 9+ |
| Developer | [TapNation](https://appshunter.io/developer/1483575279) | [HAPPY GAME COMPANY TEKNOLOJI ANONIM SIRKETI](https://appshunter.io/developer/1523367113) |

## What reviewers say

### Rat Killer Robot Invasion

[App page](https://appshunter.io/ios/app/rat-killer-robot-invasion/id6464372285)

Embark on an epic quest to exterminate waves of invading rats with futuristic weapons. Collect in-game currency to unlock new zones, upgrade your robot companion, and customize its appearance. Explore diverse worlds and face challenging puzzles and boss battles.

**Highlights:** Rat extermination action, Robot customization, Weapon collection and upgrades, Diverse world exploration, Puzzles and boss battles, Collect money and gems

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| VIP Membership - Weekly | $4.99 | per 7 days |
| Elite Membership - Weekly | $8.99 | per 7 days |
| Elite Membership - Monthly | $24.99 | per month |
| Skip It - Small Pack | $0.99 | one-time |
| One Time Offer | $1.99 | one-time |
| Handful Of Crystals | $1.99 | one-time |
| Bunch Of Crystals | $4.99 | one-time |
| Pile Of Crystals | $8.99 | one-time |
| Rats Pass | $9.99 | one-time |
| Premium Offer | $39.99 | one-time |

**What reviewers like**

- 👍 Fun gameplay
- 🦂 Scorpion mech character

**What reviewers complain about**

- 🐛 Glitchy and buggy
- 🕰️ Excessive ads
- ⚠️ Imbalanced game mechanics
- 💰 Progression blocked by premium currency

**Reported bugs**

- Character flipping upside down or flying across the board
- NPCs getting stuck in portals or on walls
- Incorrect item/reward drops from chests
- Launching player off the screen
- Robot unable to keep legs on the ground and rolling around

**Requested features**

- Optimize performance and fix bugs
- Improve game balance and progression
- Add more content and features
- Provide better customer support


### Alien Run

[App page](https://appshunter.io/ios/app/alien-run-tentacle-attack/id6480405768)

Become an unstoppable alien invader in this action-packed survival game. Use your tentacle powers to capture fleeing humans and dominate the battlefield in an epic invasion scenario. Experience intense chases and strategic mob control as the ultimate predator.

**Highlights:** Alien invasion gameplay, Tentacle attack and capture, Mob control, Monster run challenges, Chase running humans, Strategic hunting

**Features:** macOS Compatibility

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Special Offer | $0.99 | one-time |
| 1 day No Ads | $0.99 | one-time |
| Skip It Bundle 2 | $1.99 | one-time |
| No Ads | $4.99 | one-time |
| Mini Alien | $5.99 | one-time |
| Bundle 3 | $6.99 | one-time |
| Mini Alien + No Ads | $8.99 | one-time |
| Bundle 2 | $8.99 | one-time |
| Bundle 5 | $19.99 | one-time |
| Bundle 6 | $39.99 | one-time |


## Frequently asked questions

### Is Rat Killer Robot Invasion free?

Rat Killer Robot Invasion is free to download, with in-app purchases available.

### Is Alien Run free?

Alien Run is free to download, with in-app purchases available.

### Which has better reviews, Rat Killer Robot Invasion or Alien Run?

Rat Killer Robot Invasion is rated higher. Rat Killer Robot Invasion averages 4.6 out of 5 from 2K ratings, while Alien Run averages 2.3 from 3 ratings.

### Do Rat Killer Robot Invasion or Alien Run have ads?

Both Rat Killer Robot Invasion and Alien Run show ads.

### Which is updated more often, Rat Killer Robot Invasion or Alien Run?

Rat Killer Robot Invasion ships an update every 10 days, and Alien Run every 9 days. Most recently, Rat Killer Robot Invasion was updated on November 3, 2026 and Alien Run on October 30, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*