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Interplanetary

Interplanetary

In this turn-based strategy game, players wage interplanetary wars by developing their home planets and firing massive artilleries through the unpredictable gravity fields of the planetary system.

Released May 12, 2015 Developer Team Jolly Roger Publisher Team17 Digital Ltd Platforms Windows · Mac · Linux StrategyIndieSpaceTurn-Based StrategyTurn-Based
View on Steam ↗ Free (US · as of 2026-07-26)

What players say

Steam review score and the most-helpful voices, which may include critical ones. Data as of 2026-05-20.

78.7%positive804 reviews
Recommended · 0 found this helpful

“gg”

— a player, Steam review · 16 hrs played
Read more reviews ↗

Achievement stats

Global completion rates across all Steam players — a data view of how far people actually get. Source: Steam official stats · as of 2026-07-25.

25achievements
2.4%median completion
0.8%rarest: Blood for the Blood God
22.0% of players 20.2% of players 18.3% of players 13.5% of players 10.5% of players 8.1% of players 8.1% of players 7.6% of players 7.6% of players 5.1% of players 4.9% of players 4.9% of players 2.4% of players 2.0% of players 1.4% of players 1.3% of players 1.2% of players 1.2% of players 1.0% of players 0.9% of players 0.9% of players 0.9% of players 0.8% of players 0.8% of players 0.8% of players 22.0% 0% most earned rarest
Almost everyone has
22.0%Surgical Devastation — Fire Solar Laser superweapon.
20.2%Like a Fist of an Angry God — Fire Asteroid Diversion superweapon.
18.3%Lord in a Harvest — Defeat an enemy planet.
Rarest badges of honor
0.8%Blood for the Blood God — Win 50 online multiplayer matches.
0.8%BSOD — Win 100 single player games.
0.8%Skulls for the Skull Throne — Win 100 online multiplayer matches.

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-25. Steam prices vary by region — always confirm your local price on Steam.

Freecurrent · sampled 2026-07-26 08:39 UTC
Freelowest since tracking began2026-07-25

Latest official news

Developer announcements via the Steam news API — links go to the original posts. More across all games on the news hub.

Dec 21, 2017
Save 66% on Interplanetary Enhanced Edition on Steam Winter Sale

http://cdn.edgecast.steamstatic.com/steamcommunity/public/images/clans/5912974/048dd7b95de91295a1bceac739dd6f45e7ed78cc.png The Holidays season is here, and we’re happy to announce that Interplanetary

Dec 21, 2017
Save 66% on Interplanetary Enhanced Edition on Steam Winter Sale

http://cdn.edgecast.steamstatic.com/steamcommunity/public/images/clans/5912974/048dd7b95de91295a1bceac739dd6f45e7ed78cc.png The Holidays season is here, and we’re happy to announce that Interplanetary

Dec 05, 2017
Save 66% on Interplanetary Enhanced Edition at the Special Midweek Madness

http://cdn.edgecast.steamstatic.com/steamcommunity/public/images/clans/5912974/8831c4dd5a66a114473d188e6bbfb27b01986a37.png Hey Interplanetarists, Tomorrow, December 6th, we are celebrating 100 years

Dec 05, 2017
Save 66% on Interplanetary Enhanced Edition at the Special Midweek Madness

http://cdn.edgecast.steamstatic.com/steamcommunity/public/images/clans/5912974/8831c4dd5a66a114473d188e6bbfb27b01986a37.png Hey Interplanetarists, Tomorrow, December 6th, we are celebrating 100 years

Nov 02, 2017
Announcing Worbital Steam Group

http://cdn.edgecast.steamstatic.com/steamcommunity/public/images/clans/30208915/84352812818dd2e60793f8ea40afda4c935fa8b2.png A few weeks back we announced our new game— Worbital . We’ve just opened a

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From our knowledge graph — ranked by shared traits, not a black box. Each card says why it's here.

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Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

From the Steam store record, snapshot 2026-05-20.

GenresIndie, Strategy
Player tagsStrategy · Indie · Space · Turn-Based Strategy · Turn-Based · Multiplayer · Singleplayer · Sci-fi · Physics · Local Multiplayer · 4X (SteamSpy community voting)
FeaturesSingle-player · Multi-player · Cross-Platform Multiplayer · Steam Achievements · Steam Trading Cards · Family Sharing
LanguagesEnglish
Achievements25
Estimated owners100,000 – 200,000 (SteamSpy)
Official sitehttp://www.interplanetarygame.com
Minimum system requirements (PC)

Minimum: OS *: Windows 7 Processor: DualCore AMD/Intel 2.3 GHz Memory: 4 GB RAM Graphics: AMD Radeon 4850 / Nvidia 8800 GTS 512 Mb or equivalent DirectX: Version 10 Storage: 1024 MB available space