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Natural Selection 2

Natural Selection 2

A fast paced multiplayer shooter that pits aliens against humans in a strategic and action-packed struggle for survival!

Released Oct 30, 2012 Developer Unknown Worlds Entertainment Publisher Unknown Worlds Entertainment, KRAFTON, Inc. Platforms Windows MultiplayerStrategyFPSTeam-BasedAction
View on Steam ↗ $4.99 (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.

85.3%positive13,139 reviews
Recommended · 13 found this helpful

“This game started as a mod for half life 1 as Natural Selection 1, and grew into this very robust standalone that can be quite the engaging fusion of RTS and FPS in a very team oriented experience with a lot of diverse strategies and unique ways to play between the marines and…”

— a player, Steam review · 12 hrs played
Recommended · 6 found this helpful

“It's been well over a decade since I last played this, so going into it I didn't remember anything about this game. I was surprised to see multiple servers with full capacity. Ended up joining a random lobby and played for the marines. For the other team (Aliens) they had this…”

— a player, Steam review · 4 hrs played
Not recommended · 38 found this helpful

“Don't bother with this game. The people who play it are god awful. Look for the review by Opti from December 2025-ish. It's full of sick weirdo scumbags (and scammers) and is just not a good one to pick up. If you asked me 10 years ago, I'd still think this game is the ish. But…”

— a player, Steam review · 5,685 hrs played
Read more reviews ↗

Player activity

Monthly average concurrent players. Live count fetched 2026-07-23 23:33 UTC · history via SteamCharts.

66playing at last check
12524-hour peak
9,429all-time peak
0 2.5k 5k 2013 2015 2017 2019 2021 2023 2025 2.8k avg · Nov 2012

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.

137achievements
0.0%median completion
0.0%rarest: Matched Play Unlock
18.5% of players 17.0% of players 16.2% of players 16.0% of players 15.8% of players 15.2% of players 14.5% of players 14.0% of players 13.6% of players 13.3% of players 12.7% of players 12.2% of players 10.9% of players 10.5% of players 9.8% of players 9.6% of players 9.3% of players 7.4% of players 6.6% of players 6.2% of players 5.3% of players 4.1% of players 3.9% of players 3.2% of players 2.4% of players 2.2% of players 1.5% of players 0.9% of players 0.8% of players 0.6% of players 0.5% of players 0.4% of players 0.4% of players 0.3% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 0.0% of players 18.5% 0% most earned rarest
Almost everyone has
18.5%They Just Keep Coming — Kill a Skulk
17.9%TSF — Play a round as a Marine
17.0%Strategic Thinking — Follow 5 Commander’s orders in a single round
Rarest badges of honor
0.0%Matched Play Unlock — Hidden achievement
0.0%Matched Play Unlock — Hidden achievement
0.0%Matched Play Unlock — Hidden achievement

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.

$4.99current · sampled 2026-07-26 08:39 UTC
$4.99lowest since tracking began2026-07-11
US4.99 USD
EU4.99 EUR
UK4.29 GBP
Australia7.50 AUD
Canada6.49 CAD
Japan580 JPY
Brazil16.99 BRL
China22.00 CNY

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

China≈$3.2 Brazil Japan Canada US Australia EU UK≈$5.7

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

$0 $5 $10 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.

Feb 14, 2023
Unknown Worlds Entertainment ceases active development of Natural Selection 2

10 years since its official release and over 117 updates later, active development of Natural Selection 2 has ended. Our team and this community have provided many years of passion and support for thi

Dec 30, 2022
HOTFIX Update 344

Greetings! We just deployed a hotfix to the game that resolves several issues with skill values not updating in certain cases. Your game version number will increase to reflect 344 after you receive t

Dec 09, 2022
Matched Play v1.0 Released!

Matched Play v1.0 is officially released! We have made several changes and fixes to the system over the last few months, but our official release includes improved regional servers with more dedicated

Jun 27, 2022
Matched Play Beta 4 - Update 342 Released

Changelog Tweaks / Improvements Added a Top Bar UI toggle to the advanced options menu. The Observatory’s scanned Status Effect icon will always show for Aliens within range, regardless of HUD detail

Feb 03, 2022
Update 341 Released!

Update 341 is now available on steam and includes multiple updates to maps and a bunch of bug fixes and tweaks to both the game and matched play. There are also additional updates to the balance which

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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.

GenresAction, Indie, Strategy
Player tagsMultiplayer · Strategy · FPS · Team-Based · Action · Sci-fi · RTS · Aliens · Indie · Competitive · Shooter · Co-op (SteamSpy community voting)
FeaturesMulti-player · PvP · Online PvP · Steam Achievements · Steam Trading Cards · Steam Workshop · Steam Cloud · Valve Anti-Cheat enabled
LanguagesEnglish * , French, German, Spanish - Spain, Polish, Russian, Finnish, Romanian, Swedish, Czech *
Achievements137
Estimated owners1,000,000 – 2,000,000 (SteamSpy)
Official sitehttp://www.naturalselection2.com
Minimum system requirements (PC)

Minimum: OS: 7 64-Bit (SP1) or Windows 10 64-Bit Processor: Dual-core processor 2.4 GHz (Intel Core 2 Duo, i3), 2.6 GHz (AMD Athlon or FX) Memory: 6 GB RAM Graphics: DirectX 11 compatible dedicated video card with 2 GB VRAM DirectX®: 11.0 Hard Drive: 13 GB HD space Other Requirements: Broadband Internet connection