# Alien vs Gamma

The clearest difference is ads: Alien at none against Gamma's shown. Alien also leads on chart position (#81 vs unranked). Gamma's advantage is update cadence (every 5 days vs every 2 months) and rating (4.8 vs 4.5). On price, review sentiment, in-app purchases and monetization model there is nothing between them.

Both are free to download. Alien sells 1 one-off in-app purchase and Gamma sells 5 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

Gamma holds the better App Store score, 4.8 against 4.5. That said, the two scores are not equally well evidenced: Gamma has 11K ratings behind it against 1.3K, so its average is the more settled of the two. Written reviews point the same way: 80% of Alien's written reviews are positive against 84% of Gamma's.

Alien ships an update every 2 months, Gamma every 5 days. The most recent releases landed on October 27, 2026 and October 29, 2026 respectively.

## The numbers

| Metric | Alien | Gamma |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.5 (1.3K ratings)](https://appshunter.io/ios/app/alien-isolation/id1573029040/reviews) | **[4.8 (11K ratings)](https://appshunter.io/ios/app/gamma-ps-1-game-emulator/id6499106870/reviews)** |
| Number of ratings | 1.3K | **11K** |
| Positive reviews | 79.7% of reviews | **83.8% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Best chart rank | **#81** | — |
| Size | 1.9 GB | 150 MB |
| Requires iOS | 16.5 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 17+ | 4+ |
| Developer | [Feral Interactive Ltd](https://appshunter.io/developer/402470125) | [ZODTTD LLC](https://appshunter.io/developer/290594874) |

## What reviewers say

### Alien

[App page](https://appshunter.io/ios/app/alien-isolation/id1573029040)

**Currently charting:** #81 Top Free · Adventure, #200 Top Free · Action (US App Store)

Embark on a terrifying quest for survival aboard a space station. Unprepared and underequipped, you must use your wits and courage to escape an unknown menace. Experience a faithful mobile replication of the classic survival horror game, complete with AAA visuals and an arresting narrative.

**Highlights:** Survival horror gameplay, Stealth and evasion mechanics, Resource scavenging and crafting, Touchscreen controls with customization, Gamepad and mouse/keyboard support, Faithful mobile replication of AAA visuals, Includes all DLC content

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Game Unlock | $14.99 | one-time |

**What reviewers like**

- 🚀 Excellent port with great performance
- 👍 Impressive graphics and visuals
- 🎮 Smooth controls and controller support
- 🎬 Captures the Alien franchise atmosphere well
- 🕹️ Immersive gameplay experience

**What reviewers complain about**

- 🔋 Device overheating and battery drain issues
- 🐛 Occasional bugs and glitches
- 🕹️ Touchscreen controls not ideal for certain gameplay elements
- 🕰️ Long loading times and unskippable intro

**Reported bugs**

- Certain puzzles/objectives not triggering correctly
- Sound issues like audio cutting out
- Compatibility problems with older devices

**Requested features**

- Add more graphics/performance options
- Improve auto-save and checkpoint system
- Implement Magic Keyboard support
- Include Chinese language support


### Gamma

[App page](https://appshunter.io/ios/app/gamma-ps-1-game-emulator/id6499106870)

This app allows you to play your favorite PlayStation 1 games on your device. It offers enhanced graphics, controller customization, and cloud syncing for save states. Enjoy a superior gaming experience with easy file import and cheat code support.

**Highlights:** Enhanced hi-resolution graphics, Customizable controller skins, Save state syncing via cloud, Cheat codes system, Wide file format support, Hardware controller support

**Features:** macOS Compatibility, Game Controller support, Family Sharing

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Great Supporter | $0.99 | per month |
| Fantastic Supporter | $1.99 | per month |
| Incredible Supporter | $4.99 | per month |
| Greatest Supporter Of All Time | $9.99 | per month |
| Gamma Pro - Remove Ads | $4.99 | one-time |

**What reviewers like**

- 🚀 Smooth emulation
- 👍 Easy to use interface
- 🎮 Good controller support
- 🔥 Brings PS1 games to mobile

**What reviewers complain about**

- 🐛 Crashes with Bluetooth controllers
- 🔊 Audio issues with some games
- 📺 Limited display/graphics options
- 💰 Ads and paid version required

**Reported bugs**

- Crashes when customizing controls
- Some games freeze or have graphical issues
- Dropbox sync not working properly

**Requested features**

- Multiple controller support
- Customizable button layouts
- More display/graphics settings
- Ability to load .cue files


## Frequently asked questions

### Is Alien free?

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

### Is Gamma free?

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

### Which has better reviews, Alien or Gamma?

Gamma is rated higher. Alien averages 4.5 out of 5 from 1.3K ratings, while Gamma averages 4.8 from 11K ratings.

### Do Alien or Gamma have ads?

Gamma shows ads; Alien does not.

### Which is updated more often, Alien or Gamma?

Alien ships an update every 2 months, and Gamma every 5 days. Most recently, Alien was updated on October 27, 2026 and Gamma on October 29, 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.*