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  (40 - 50 of 434)
W_Shadow
W_Shadow Jun 7 2011, 3:29pm says:

ok WTF i cant play the game cause i got half-life 1 SOURCE becasue of the SOURCE are you fu*kin kidding me can this be fixed somehow?

-1 votes     reply to comment
blackopsmaster
blackopsmaster Jun 5 2011, 8:26pm says:

make a non-steam version and plz make a singleplayer version to i hate having to use bots

+1 vote     reply to comment
blackopsmaster
blackopsmaster Jun 5 2011, 7:15pm says:

how do i build as an alein because i get 100/100 resources and i still can,t build upgrade towers why?

+2 votes     reply to comment
EDOC_32
EDOC_32 Jun 2 2011, 4:00pm says:

I no like NS!. why??? i no have Steam! and this mod need steam!. please a version NON-STEAM for Natural Selection :)

-2 votes     reply to comment
Lusicore
Lusicore Jul 4 2011, 7:44am replied:

i play this as non-steam

+3 votes     reply to comment
tschumann
tschumann Jun 5 2011, 6:04am replied:

I think it relies on functionality that's only available in the Steam version of Half-Life.

+2 votes     reply to comment
Dexter.InOrdinate
Dexter.InOrdinate Jun 1 2011, 12:21am says:

Best MP mod ever - I'm really glad it's still very much alive. Can't wait to buy the new version.

+2 votes     reply to comment
Far-East
Far-East May 21 2011, 9:19am replied:

How to use bot?

+2 votes     reply to comment
tschumann
tschumann May 30 2011, 11:01pm replied:

Depends which bot you're using. They should all come with instructions though.

+2 votes     reply to comment
Schinchan56798
Schinchan56798 Feb 25 2011, 7:31pm replied:

There are around 20 servers. It depends on what place you live.

+2 votes     reply to comment
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Platform
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Game
Half-Life
Developer
Unknown Worlds
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Release Date
Released Jun 3, 2007
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Real Time Strategy
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Fighter
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