# Outer Space Defense — Close maneuver simulation

> Close maneuver simulation (iPhone/iPad app by Princeton Satellite Systems.)

- Source: https://appshunter.io/ios/app/outer-space-defense/id424384673 (this page in markdown: same URL + `.md`)
- Developer: [Princeton Satellite Systems](https://appshunter.io/developer/395066089)
- Category: Games, Action, Simulation
- Price: $0.99
- Age rating: 4+
- Requires: iOS 12.0 · 57 MB
- Languages: American English
- Released: 2011-03-13
- Data updated: 2026-05-15
- User reviews in markdown: https://appshunter.io/ios/app/outer-space-defense/id424384673/reviews.md

## What is Outer Space Defense?

Outer Space Defense is an addictive test of skill pitting your mastery of spacecraft orbital control and prowess with a laser against multiple attacking enemy satellites. See how long you last against a relentless enemy that launches satellites designed to take you out at a faster and faster pace!

Plays great natively on both iPhone and iPad!

You are one of a group of elite satellite operators tasked with controlling one of your country's few remaining surveillance satellites observing the enemy. In order to maintain surveillance, the satellite must be kept as close as possible to its optimal orbit. Watch out though, the enemy constantly sends killer satellites intended to destroy your surveillance satellite. You must avoid these or destroy them with your onboard laser. The longer you last, the faster they come!

As you thrust to maneuver, you use up fuel and as you fire your laser, you run down its battery. Luckily, orbiting fuel depots can replenish your satellite if you get close enough to them. Manage your resources to maximize your points.

Real orbital mechanics and control algorithms govern the motion and abilities of both your satellite and the enemy satellites. Make sure you don't stray too far from your optimal orbit. The closer you stay, the faster your points accumulate and if you get out of control, it's game over!

Controls:

Three different thrust control modes: tilt-to-thrust, thumb sliders, or directional touch.
Two different laser fire control modes: joystick plus button, or joystick alone.

Try it!


## Version history (last 5 releases)

### 1.1.4 — 2025-08-05

This version is update to the latest IoS

### 1.1.3 — 2017-12-05

Space Defense has been made compatible with iOS 11.

### 1.1.2 — 2016-11-14

Made compatible with 10.1

### 1.1 — 2015-07-28

Made compatible with iOS 7 and 8

### 1.0 — 2011-03-12

No release notes.

## More apps by Princeton Satellite Systems

- [QuaternionCalc](https://appshunter.io/ios/app/quaternioncalc/id1022679681)
- [KineTrack](https://appshunter.io/ios/app/kinetrack/id6739670464)
- [KineTrack Pro](https://appshunter.io/ios/app/kinetrack-pro/id6740782166)
- [AerospaceSim](https://appshunter.io/ios/app/aerospacesim/id6746456133)

All apps by Princeton Satellite Systems: https://appshunter.io/developer/395066089

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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 2026-05-15.*