⚜ SteamCozy

Home / Games / Grey Goo

Grey Goo

Grey Goo

Fight for control of a frontier world. Gather resources, build your base, and command your forces in battle. Survive long enough to unleash your ultimate weapon - THE EPIC.

Released Jan 23, 2015 Developer Petroglyph, Six Foot Publisher Six Foot, Grey Box Platforms Windows StrategyRTSSci-fiMultiplayerAliens
View on Steam ↗ $29.99 (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.

67.8%positive4,274 reviews
Recommended · 8 found this helpful

“Radiant Strider Trident Clasher Klaxon Overpowered Forgotten Pretty Good Starcraft Xcom RTS Command and Conquer with unique Sci fi story Forgotten Gem and Game Really wish there were creep camps like Warcraft and Starcraft Don't think they Should Have named them Beta and Named…”

— a player, Steam review · 11 hrs played
Recommended · 2 found this helpful

“Grey Goo is a competent RTS that genuinely impressed me with its asymmetric faction design — the Goo in particular are unlike anything I've played, with their mobile Mother Goo economy and nomadic playstyle feeling completely fresh. The production values are top-notch: Frank…”

— a player, Steam review · 8 hrs played
Not recommended · 2 found this helpful

“Ok. i was playing only campain and this game is not bad, but so annoying that i must write my opinion abot it. First of all, its looks like copy of Earth 2160, very simple copy. Your HUD is so basic that it hurts. Your troops, are idiots, i was loosing whole armys while figthing…”

— a player, Steam review · 18 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live count fetched 2026-07-23 23:54 UTC · history via SteamCharts.

4playing at last check
624-hour peak
3,998all-time peak
0 500 1k 2015 2017 2019 2021 2023 2025 615 avg · Jan 2015

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.

35achievements
2.3%median completion
0.5%rarest: World War G
45.0% of players 28.4% of players 20.0% of players 19.8% of players 18.9% of players 16.4% of players 10.2% of players 10.0% of players 6.5% of players 5.1% of players 4.7% of players 3.7% of players 3.6% of players 3.2% of players 3.2% of players 3.2% of players 3.0% of players 2.3% of players 2.1% of players 1.9% of players 1.5% of players 1.1% of players 1.1% of players 1.0% of players 0.9% of players 0.7% of players 0.7% of players 0.5% of players 0.5% of players 0.5% of players 0.5% of players 0.5% of players 0.5% of players 0.5% of players 0.5% of players 45.0% 0% most earned rarest
Almost everyone has
45.0%Start of Something Epic — Build an Epic unit
28.4%No More Running — Complete the Beta campaign on any difficulty
20.0%Practice Makes Perfect — Win a skirmish match against an AI
Rarest badges of honor
0.5%World War G — Consume 100 enemy units or structures with formless Goo in a ranked multiplayer match
0.5%I Could Do This All Day — Win 100 skirmish matches
0.5%Full Time Job — Win 100 multiplayer matches of any size or mode

Price tracking

US-region pricing (USD), sampled twice daily by our own tracker since 2026-07-11. Steam prices vary by region — always confirm your local price on Steam.

$29.99current · sampled 2026-07-26 08:39 UTC
$29.99lowest since tracking began2026-07-11
US29.99 USD
EU27.99 EUR
UK22.99 GBP
Australia42.95 AUD
Canada32.99 CAD
Japan2,980 JPY
Brazil55.99 BRL
China88.00 CNY

Regional prices at last sample, in local currency — Steam sets each region's price independently.

Brazil≈$11 China Japan Canada US Australia UK EU≈$32

Cheapest → most expensive, converted to USD at ECB reference rates (2026-07-24). Relative comparison only.

$0 $25 $50 07-11 07-13 07-16 07-19 07-22 07-26

Latest official news

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

Nov 24, 2016
Grey Goo 75% off during the Steam Autumn sale!

http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/7611330/15eb5aabe53512c031ffa92dcf8cb8ec587d0574.jpg

Nov 24, 2016
Grey Goo 75% off during the Steam Autumn sale!

http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/7611330/15eb5aabe53512c031ffa92dcf8cb8ec587d0574.jpg

Jun 23, 2016
GET GREY GOO FOR $10.16 DURING THE STEAM SUMMER SALE!

http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/7611330/b4c3432d0e196bf61067fbc5822def9b7f67c147.jpg The Steam Summer Sale is here! Buy the Grey Goo Definitive Edition for $10.16

Jun 23, 2016
GET GREY GOO FOR $10.16 DURING THE STEAM SUMMER SALE!

http://cdn.akamai.steamstatic.com/steamcommunity/public/images/clans/7611330/b4c3432d0e196bf61067fbc5822def9b7f67c147.jpg The Steam Summer Sale is here! Buy the Grey Goo Definitive Edition for $10.16

Apr 28, 2016
Grey Goo Archives - The Valiant Project

The Valiant Project was a multi-university research and development program to advance human/computer interactions. Blending disciplines from behavior-based robotics and early childhood development th

Games like Grey Goo

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

Supreme Commander 2 Supreme Commander 2 87.2% · 7,775 reviews shares Real Time, Mechs, Robots, RTS Executive Assault Executive Assault 85.3% · 1,264 reviews shares Real Time, Robots, RTS, Base Building Supreme Commander: Forged Alliance Supreme Commander: Forged Alliance 96.8% · 8,740 reviews shares Real Time, Competitive, Robots, RTS Rusted Warfare - RTS Rusted Warfare - RTS 97.0% · 3,229 reviews shares Real Time, Mechs, Robots, RTS Supreme Commander Supreme Commander 89.1% · 1,711 reviews shares Real Time, Robots, RTS, Base Building Planetary Annihilation: TITANS Planetary Annihilation: TITANS 85.5% · 9,580 reviews shares Mechs, Robots, RTS, Base Building Homeworld: Deserts of Kharak Homeworld: Deserts of Kharak 77.9% · 5,989 reviews shares Real Time, RTS, Futuristic, Space Iron Harvest Iron Harvest 72.5% · 8,111 reviews shares Real Time, Mechs, Competitive, RTS

Screenshots

Official Steam store screenshots — click any shot to enlarge.

Facts & details

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

GenresStrategy
Player tagsStrategy · RTS · Sci-fi · Multiplayer · Aliens · Base-Building · Great Soundtrack · Singleplayer · Mechs · Robots · Female Protagonist · Space (SteamSpy community voting)
FeaturesSingle-player · Multi-player · Steam Achievements · Steam Trading Cards · Steam Workshop · Steam Cloud · Valve Anti-Cheat enabled · Stats
LanguagesEnglish * , French, Italian, German * , Spanish - Spain, Portuguese - Brazil, Russian, Polish *
Achievements35
Estimated owners200,000 – 500,000 (SteamSpy)
Official sitehttp://www.greybox.com/greygoo/en/
Minimum system requirements (PC)

Minimum: OS *: 32-bit Windows 7 Processor: 3.5 GHz Intel Core i3 Dual Core or equivalent Memory: 4 GB RAM Graphics: 1024 MB DirectX 11 capable video card (GeForce GTX 460 or AMD Radeon HD 5870) DirectX: Version 11 Network: Broadband Internet connection Storage: 15 GB available space