Natural Selection is an action-strategy game for the PC. It is a "Half-life modification", which means it is written on top of the Half-life game engine. "Mods" are a new sort of underground game development that enables small teams to create games using the technology of existing games. This means less expensive and lower risk game development, which allows experimentation and innovation. This arrangement also implies that "mods" are made as art, not for making money. When complete, Natural Selection will be released for free to all owners of Half-life, which is required to play Natural Selection.

Game summary

Multiplayer-only Half-life mod where one team plays marines and the other plays aliens. The humans must keep their cool and work together to assault an alien-infested spacecraft or colony. Marines vs. marines and aliens vs. aliens scenarios are also supported.

"First-person strategy" with a real resource model and consequences for actions. Both sides are genuinely different and together they accommodate different play styles:

Marines::Fighting skill is less important, strategy and communication take its place. Playing as a marine will be a tense experience with methodical planning and strategy, interrupted with action.

Aliens::Playing as an alien will be an intense action experience, rewarding reflexes and alien heroics. Communication and coordination don't require typing.

Accessible, fast, mouse-driven interface: no keys beyond those used in Half-life needed.

Simple to learn and play, it is hard-core action/strategy for a mainstream audience.

Innovative social dynamics lead to memorable games.

Atmospheric indoor sci-fi environments full of steam, smoke and ambient soundscapes

Natural Selection is out, go get it already! :P

Recent Changlogs:
Version 3.2
Version 3.1
Version 3.0

The team is now working on a version for Half-life II and will post news here when ready.

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Blog RSS Feed Report abuse Latest News: Natural Selection Source Code Released!

2 comments by JPolito on Jan 23rd, 2014

Natural Selection Source Code Released!

Posted by Hugh
Original news post available here: Unknownworlds.com
Natural Selection Source Code

Back in 2002, Natural Selection was released…

Since then, lots has happened. Unknown Worlds was formed and NS2 was released, reaching multiple times the number of players the original mod did. Charlie, the creator of NS, has come so far that he’s now working on a new game: Subnautica.

But we will never forget what started it all. Today, we are proud to announce that Natural Selection Source Code is now available to anyone, free of charge. Head on over to GitHub to get it. It’s not ‘open source’ – There is some legal hoo-ha that prevents that. But it is all there.

Natural Selection 1

Got balance?

You can use the NS source code to make your own version of the original game, fix problems with it, make new problems, or just see how the game worked.

We hope you enjoy tinkering with it. NS was one of the greatest mods of all time – And we can’t wait to see what you are able to do with it.

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Natural Selection v1.0 plus patch v1.04 (outdated)

Natural Selection v1.0 plus patch v1.04 (outdated)

Mar 26, 2013 Full Version 0 comments

It's an old version of NS, dated by 29th October of 2002. Uploaded for historical and collectors' purposes, because it's hard to find on internet now...

Natural Selection v2.0 Dedicated Server (outdated)

Natural Selection v2.0 Dedicated Server (outdated)

Mar 26, 2013 Server 0 comments

It's an old version of NS, dated by 30th July of 2003. Uploaded for historical and collectors' purposes, because it's hard to find on internet now. Requires...

Natural Selection v2.0 Client (outdated)

Natural Selection v2.0 Client (outdated)

Mar 26, 2013 Full Version 0 comments

It's an old version of NS, dated by 30th July of 2003. Uploaded for historical and collectors' purposes, because it's hard to find on internet now. Requires...

NS 3.2 Hungarian Translation with voices

NS 3.2 Hungarian Translation with voices

May 18, 2009 Patch 10 comments

The Half-Life mod , called Natural Selection is basicly ENGLISH, but this one is enables the Hungarian Translation. Ha nem értesz angolul, akkor ezt töccsed...

Natural Selection v3.2 Installer

Natural Selection v3.2 Installer

Mar 2, 2007 Full Version 65 comments

The full client installer for Natural Selection v3.2. Check out the full changelog here.

Natural Selection v3.2 Server

Natural Selection v3.2 Server

Mar 2, 2007 Full Version 7 comments

The dedicated server zip for Natural Selection v3.2. Check out the full changelog here

Post comment Comments  (70 - 80 of 435)
dwsadsa
dwsadsa Oct 14 2010, 10:47pm says:

This still has one serious bug left.

For some people, when you join a team the game crashes

+3 votes     reply to comment
tschumann
tschumann Nov 30 2010, 3:08pm replied:

Any idea what's causing the crash?

+2 votes     reply to comment
dwsadsa
dwsadsa Dec 9 2010, 9:27pm replied:

i wish i knew.. i think it may be a problem with the whole teleporting into teams.

they should just make the team joining like how it is in CS or ESF

+2 votes     reply to comment
awreid12
awreid12 Oct 12 2010, 5:10pm says:

omg, cant beleive that this is a half-life mod! nice job!

+1 vote     reply to comment
dwsadsa
dwsadsa Oct 12 2010, 6:03pm replied:

ya to bad it doesnt work for half the people who download it

+1 vote     reply to comment
Megadave2003
Megadave2003 Oct 12 2010, 2:25pm says:

I want to play it, but it dont support the only type of Video mode my computer can play.

+2 votes     reply to comment
Lusicore
Lusicore Sep 10 2010, 1:36pm says:

and i discovered it says name of lobby: counter stricke source map: cs_whateveritsnameis WTF?!?! i dont even have cs source!!!!!!!!!

0 votes     reply to comment
Lusicore
Lusicore Sep 10 2010, 11:31am says:

why when i type some1s ip then i refresh so it can readi it then the ip disappears?????? and this happens to my sis too so we cant both join nor host.. this doesnt happens with all my other mods (hl1, hlop4, cs1.6, hlwe1.5, desertcrisis, gomod...) but this is the best one and i cant JOIN AAAAAAAAAAAAAAAAAAAAAAAAAH

0 votes     reply to comment
Lusicore
Lusicore Sep 7 2010, 1:20pm says:

super cool, its sad that i have to play alone :[

+1 vote     reply to comment
dwsadsa
dwsadsa Sep 26 2010, 8:30pm replied:

no you dont. all you need to do is find bots and then wha-bam you got a bad *** game.

+1 vote     reply to comment
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Platform
Windows
Game
Half-Life
Developer
Unknown Worlds
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Official Page
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Release Date
Released Jun 3, 2007
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Style
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Real Time Strategy
Theme
Fighter
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Multiplayer
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