A user made mod by Flayra for half life, who set up his own company with the reputation he gained from it
Involves two teams, the Kharaa (alien) and the TSA (Marines) Who battle it out on base building, or combat maps. They gain upgrades and become more powerful

Has a large fan based community with many user made levels.
Dammit, im bored...Im gonna go play natural selection

Natural Selection Kicks ass

Natural Selection is much better than Counter Strike
by Wrin April 21, 2004
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A mod to Half-life that is similar to Starcraft, and Aliens combined into a FPS with RTS included. Teamplay with aliens vs marines.
n00b: commander, gimme a jp/hmg now!
commander: no
n00b: eject him!
-Commander has been ejected-
by G2 July 12, 2003
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Dude, CS is gay and its full of 8 year old kids and whiners and hackers and the mod himself has no teamwork at all. Natural-selection is a strategy and action mod that requires lots of teamwork and skilled players to win. go download it at www.natural-selection.org
by Gungsta-Pasta June 24, 2003
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The only thing similar about Natural Selection's gameplay and Counter-Strike's is that they both involve two teams.
by Trent August 9, 2003
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1. Another name for the Columbine High School massacre.

2. Words printed on the shirt worn by Eric Harris as he committed the above.
"Sometime in April me and V will get revenge and will kick natural selection up a few notches" - Eric David Harris
by ColumbineInBloom January 15, 2005
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a game that combine rts with a fps stature. Aliens vs Marines(Kharaa (alien) and the TSA (Marines)) in the future. Great hl1 mod, dont understand the bitching about the upgrading or balancing. Its more the map placement of res towers than anything else.
I knifed 2 onos in a row today. Panoolied.
by whuh? November 14, 2004
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