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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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.

Natural Selection source code now available!

Natural Selection source code now available!

News 11 comments

Unknown Worlds released the source code of Natural Selection and it is now free to download.

NS2 Alpha Date Set!

NS2 Alpha Date Set!

News 27 comments

As you all know, we strongly value our ties to you, the community. When we released NS v1.0 after 18 months (games were easier back then!), in some ways...

Design of ns2_tram

Design of ns2_tram

News 8 comments

For today's update we would like to focus on "Tram", one of several maps currently in development. This full sized NS2 map will ship with the Alpha, so...

The Shotgun

The Shotgun

News 58 comments

We thought we'd take a moment to show you the updated version of one of the favorite weapons from NS1 (unless you were a Skulk...) - the Shotgun.

Natural Selection v1.0 plus patch v1.04 (outdated)

Natural Selection v1.0 plus patch v1.04 (outdated)

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)

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)

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

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...

Natural Selection v3.2 Installer

Full Version 66 comments

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

Natural Selection v3.2 Server

Full Version 7 comments

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

Post comment Comments  (20 - 30 of 436)
Mighty_Guy
Mighty_Guy

Do people still play this online?

Reply Good karma Bad karma+3 votes
Guest
Guest

Just finished watching the trailer. Looks like it's worth it! Downloading!

Reply Good karma Bad karma+1 vote
CriizPixel
CriizPixel

I cannot open this mod in a few second close U.U

Reply Good karma Bad karma+2 votes
Gonzalord
Gonzalord

Happned 2 me bro, just add a new shortcut in your desktop for Half-Life.exe and add -game ns
then you already start in the Mod with no crash at start
If problem persists then you must Update your Half Life game to a newer version ;) google it

Reply Good karma Bad karma+1 vote
TheUnbeholden
TheUnbeholden

Natural Selection 2 has been released, and a full fledged game this time around
Moddb.com
Store.steampowered.com

Reply Good karma Bad karma+1 vote
POD_ILL_bot_0
POD_ILL_bot_0

I see 10-20 servers every day.
Youtube.com

Reply Good karma Bad karma+1 vote
iamcreasy
iamcreasy

Is there any live server? The server list is empty when I search for one.

Reply Good karma Bad karma+1 vote
GamerPlayer
GamerPlayer

They should really have this on Desura. I was expecting it to be on Desura, but it sadly wasn't there.

Reply Good karma Bad karma+1 vote
JuQu
JuQu

This should be in Greenlight... >:o

Reply Good karma Bad karma+5 votes
AyCe
AyCe

Few servers, fewer players, extreme pings only, but it still ROCKS :D

Reply Good karma Bad karma+1 vote
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