Natural Selection (Half-Life mod) for Windows

Name: Natural Selection (Half-Life mod)
Rating: 3.9 (7 reviews)
Author: Natural Selection Team

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Editors’ Review

Download.com staffFebruary 26, 2026

Natural Selection is a multiplayer Half-Life mod pitting marines against aliens. Experience "first-person strategy" with distinct team mechanics and resource management.

Pros
- Multiplayer-only focus
- Distinct play styles for marines and aliens
- Real resource model implemented
- Emphasis on strategy and communication
- Supports different play styles
Cons
- Requires Half-Life installation
- Marines vs. marines and aliens vs. aliens not yet supported

Natural Selection (Half-Life mod) for Windows

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Used Natural Selection (Half-Life mod) for Windows?

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Full Specifications

GENERAL

Release: January 27, 2004

Latest update: February 26, 2026

Version: 3.0-beta

OPERATING SYSTEMS

Platform: Windows

Operating System

Windows 10
Windows XP
Windows 98
Windows ME
Windows 2000

Additional Requirements: Windows 98/Me/2000/XP, Half-Life retail version

POPULARITY

Total Downloads: 27,473

Downloads Last Week: 0

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User Reviews

3.9/5

7 User Votes

Probley the best free half life modification
shawn kJuly 15, 2007
Pros
To start it off i play this alot..theres tons of good servers and theres good challenges to be had. I like the choices to be alien or marine and even more theres upgrades and on some servers theres "xmenu" where you can even upgrade more. aliens have 5 differnt lifeforms and marines have jetpacks and heavy armor. There are 2 versions of the game..there is combat...head to head team fighting..or there is the Real-time version of the game where marines have a command center and aliens have hives..over all fun gameplay.
Cons
Things i hate about it ..ive ran into hackers online before..when i was alien..they'd pull out welders and fly around me really fast. And there's scripting going on with players with no skill whatsoever. another thing that will tick me off is the severs bots will be set to hard and you cant beat them wich takes the fun out of severs hosting bots.....but if you can tolerate that...NS is a very good game
Summary
New version !!!
Dr.skimmisDecember 26, 2006
Pros
Download and install the latest Natural Selection from one of the links below (150 meg). new URL <p> <p>nsarmslab.com/files/ns_install_v31.exe
Cons
The game on download.com is the old version.
Summary
Excellent strategy game
pr0tect0r7October 31, 2006
Pros
It's diversified in it's gameplay
Cons
It takes more than a few weeks to understand basic skills which can be frustrating.
Summary
ERROR!
I-WISH-I-HAD-LinuxJuly 6, 2004
Pros
Cons
Summary
when i try to connect to a server it says my level differs from anothers or it says my .dll differs
immensely awesome
April 25, 2004
Pros
Cons
Summary
NS is one of the best Half-Life mods, and it keeps getting better. An obligatory game for a good LAN party.
the speed is too low!
February 19, 2004
Pros
Cons
Summary
too much ads.
very good
January 31, 2004
Pros
Cons
Summary
game is ok overall

Developer’s Description

By Natural Selection Team

Choose between Marines or aliens in this multiplayer-only Half-Life mod.

Natural Selection is a 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 will also be supported in the near future.

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

With 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.

On the other hand, playing as an alien will be an intense action experience, rewarding reflexes and alien heroics. Communication and coordination don't require typing.

Natural Selection (Half-Life mod) for Windows

Editors’ Review

Pros

Cons

Natural Selection (Half-Life mod) for Windows

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User Reviews

Probley the best free half life modification

New version !!!

Excellent strategy game

ERROR!

immensely awesome

the speed is too low!

very good

Developer’s Description