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Interplanetary is a turn-based strategic artillery game on a cosmic scale. Develop your home planet ...

It's an arms race with each planet developing increasingly powerful weapons. Gigantic railgun batteries are the backbone of any interplanetary arsenal, but the cunning use of missiles and precision lasers may just hold the key to victory. Strategic build patterns, upgrades and defense structures might keep your vital installations standing long enough to give you an edge, but it's only a matter of time until all but one will fall.

Sometimes, your greatest foe is the planetary system itself! Don't let the unpredictable gravitational changes get the better of you—observe your surroundings, use them to your advantage, and blast your enemies back to the Stone Age!

Interplanetary: Enhanced Edition, is a revised version of the original Interplanetary.
The no longer supported original is included in the Enhanced Edition for free, for the purposes of historical preservation and (hopefully) flattering comparison.

The Enhanced Edition features include: Online AI Bots, Elliptic Orbits, Quick Targeting Mode, New Buildings, rebalancing and general fixes and improvements across the board.

Interplanetary: Enhanced Edition. Developed by Team Jolly Roger. © 2017. Interplanetary and Team Jolly Roger are trademarks or registered trademarks of Team Jolly Roger. Interplanetary published by Team17. © 2017. Team17 is a registered trademark of Team17 Digital Limited. All other trademarks, copyrights and logos are property of their respective owners.

MINIMUM:
Requires a 64-bit processor and operating system
OS: Windows 7 64 bit
Processor: DualCore AMD/Intel 2.3 Ghz
Memory: 4 GB RAM
Graphics: AMD HD 7700 Series, 1 GB VRAM or Nvidia/Intel equivalent
DirectX: Version 10
Storage: 1024 MB available space

RECOMMENDED:
Requires a 64-bit processor and operating system

MINIMUM:
Requires a 64-bit processor and operating system
OS: MacOS Sierra
Processor: Intel Core i5 2,5Ghz
Memory: 4 GB RAM
Graphics: Intel HD Graphics 4000 1536 MB
Storage: 1024 MB available space

RECOMMENDED:
Requires a 64-bit processor and operating system

MINIMUM:
Requires a 64-bit processor and operating system
OS: Ubuntu 16.+ 64 bit
Processor: DualCore AMD/Intel 2.3 Ghz
Memory: 4 GB RAM
Graphics: AMD HD 7700 Series, 1 Gb VRAM or Nvidia/Intel equivalent
Storage: 1024 MB available space

RECOMMENDED:
Requires a 64-bit processor and operating system

To activate the Steam key you've received, follow the instructions below;

First up, open the Steam client. (If you don't have it, simply click the "Install Steam" button here => Steam Store )
Sign in to your Steam account. (If you don't have one, click here to create a new one => Steam Account)
Click on the "ADD A GAME" button in the bottom corner of the client.
Then, select "Activate a product on Steam..."
Write down or copy-paste the activation key that you've received from %s in the window.
Your game is now visible in your library! Click on your "Library".
And finally, click on the game and select "Install" to start your download.