Extraneum
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About Extraneum
Extraneum is a first-person shooter about a security guard caught in an alien-monster takeover of the top-secret Project EXTRANEÜM facilities. Hired for high resilience and a strong score on the Universal Weapon Handling Assessment, you are equipped with a knife and standard-issue SMG. You fight through the outbreak to uncover the truth and find a way to end it.
Explore the laboratories
The game focuses on exploration and finding secrets as you progress through the Project EXTRANEÜM laboratories. You shoot monsters, search hidden areas and find upgrades to your health, armor and ammo.
Weapons and enemies
The campaign has 24 levels, with three boss battles at key points. It includes 12 weapons and 12 enemy types.
Key features
- 24 levels
- Three unique boss battles
- 12 unique weapons
- 12 enemy types
- Hidden upgrades for health, armor and ammo
- Secrets and hidden areas
Frequently asked questions
The best price for Extraneum is $14.99 at Steam. It is the only shop with an offer that activates in your country.
The minimum requirements for Extraneum are: Windows 7, 2 GB RAM, 300 MB storage. It runs on Windows only. The recommended specs are in the System requirements section.
No. Extraneum is a single-player game.
Yes. Valve rates Extraneum as Verified on the Steam Deck: it runs well out of the box.
Yes. Extraneum is the full base game. You need nothing else to play it.
Steam lets publishers create keys to sell in other shops. Once you activate a key, the game is yours to keep, just like a store purchase.
Disclaimer: CD keys have an inherent 1–2% average failure rate. Check the shop terms for buyer protection info. Steam offers no buyer protection for keys bought in other shops and doesn't refund them.











