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Oxygen Not Included

Oxygen Not Included

Oxygen Not Included is a space-colony simulation game. Deep inside an alien space rock your industrious crew will need to master science, overcome strange new lifeforms, and harness incredible space tech to survive, and possibly, thrive.

97%
Overwhelmingly Positive
DeveloperKlei Entertainment
PublisherKlei Entertainment
Release DateJul 30, 2019
$24.99
Peak Players27.4K
Metacritic85
PlatformsWindows · macOS · Linux
Indie
Simulation
AI Review Summary

Oxygen Not Included is a deep and demanding space colony simulation that challenges players with complex systems of physics, chemistry, and automation. While it offers immense satisfaction for those who enjoy intricate problem-solving and long-term learning, its steep difficulty curve and lack of clear tutorials can lead to significant frustration for casual players.

Pros

  • Deeply rewarding systems that provide a sense of accomplishment when solving complex engineering problems.95%
  • Exceptional longevity with thousands of hours of potential gameplay and continuous learning.90%
  • Satisfying gameplay loop where disasters are design flaws that can be fixed through better engineering.85%
  • Unique and charming art style that provides a friendly facade to high-stakes survival mechanics.80%
  • Intricate automation and resource management systems that scratch a very specific niche itch.90%

Cons

  • Extremely steep learning curve that often requires hundreds of hours or external tutorials to master.95%
  • Inadequate in-game guidance and tutorials leave many core mechanics feeling incomprehensible to newcomers.90%
  • High potential for frustration due to opaque feedback on systems like plumbing and gas management.80%
  • Gameplay can feel repetitive when forced to restart or perfect the same early-game base designs.75%

Notable Mentions

  • Players frequently compare the game's complexity to earning a degree in physics or chemistry.
  • The community heavily relies on YouTube tutorials and external guides to bridge the gap left by the in-game tutorial.
  • A small portion of the player base has noted the game's performance on Steam Deck.
Confidence: 67%
Based on the 185 most relevant reviewsGenerated on Jul 16, 2026
Game Vitals

Live snapshot

Player Activity

Current peak
11.4K
Peak · last 90 days
27.2K
All-time peak
27.4K

Price

Current price
$24.99
Lowest tracked
$7.49since Nov 24, 2025

Review Sentiment

Launch week
—
Last 30 days
94%
All-time positive
97%
Review Statistics
Total Reviews143.5K
Positive: 138.8K (97%)Negative: 4.7K (3%)

2%

Reviews from Steam Deck

0%

Dev Response Rate

431h

Avg Playtime at Review

83%

Credible Reviews