ther are a ton of FREE games tho most of them are fps games the games i am abut to list are great fun games.

F.E.A.R combat

if your rig can run it,this game is great.

http://www.joinfear.com/main

http://www.youtube.com/watch?v=bThodkszVws

Wolfenstein: Enemy Territory

fun fast paced mp fun for all.

http://www.splashdamage.com/

http://www.youtube.com/watch?v=gc3PwG3xcFw

true combat elite

a mod for Wolfenstein.E,T that makes it the most real to life game i have ever played and at the same time one of the funnest.

http://www.truecombat.us/

http://www.youtube.com/watch?v=LK6eMV0h0gA

urban terror

a mod for Q3 now a stand alone game, this game is a semi real but arcadey not unlike counter strike(but funner imo).

http://www.urbanterror.net/news.php

http://www.youtube.com/watch?v=0NrBLCcOt8k

cube

a quake like arena game thats open source.

http://cubeengine.com/

cube 2 sauerbraten

same type of game as cube 1 but this has better graphics and more maps.

http://cubeengine.com/

http://www.youtube.com/watch?v=PF2gAOiSz9U

open arena

a free game based off the Q3 engine so much so thet it is able to run almost all Q3 mods

http://openarena.ws/?about

warsow

another arena game (there is a hell of a lot of thees type games)

http://www.warsow.net/

http://www.youtube.com/watch?v=HefeGhlERCk

BTW

all most of all the big Q3 mods are stand alone games now thanks to the code being opened to the public

tremulous

a fun mash up of rts and fps games with a twist

http://tremulous.net/

http://www.youtube.com/watch?v=d-fMBBgA7LE

world of padman

never played this but have herd that this game is a fun arena game(again)

http://www.worldofpadman.com/

http://www.youtube.com/watch?v=oSa2BQOxt9E

ther are many more free games but thees are some of the best

o and for all of you mmorpg lovers out ther is

flyff

this is the funniest free mmorpg i have played

http://flyff.gpotato.com/.

O and cant forget

runescape

THE most played free mmorpg at the moment

http://www.runescape.com/

thats all of the ones i can think of the top of my head.

Hope this helps

and if you want to look for more here is some links

http://en.wikipedia.org/wiki/List_of_free_first-person_shooters

http://en.wikipedia.org/wiki/LIST_OF_FREE_MMORPGS

http://en.wikipedia.org/wiki/List_of_open_source_games

ther are a ton of FREE games tho most of them are fps games the games i am abut to list are great fun games.

F.E.A.R combat

if your rig can run it,this game is great.

http://www.joinfear.com/main

http://www.youtube.com/watch?v=bThodkszVws

Wolfenstein: Enemy Territory

fun fast paced mp fun for all.

http://www.splashdamage.com/

http://www.youtube.com/watch?v=gc3PwG3xcFw

true combat elite

a mod for Wolfenstein.E,T that makes it the most real to life game i have ever played and at the same time one of the funnest.

http://www.truecombat.us/

http://www.youtube.com/watch?v=LK6eMV0h0gA

urban terror

a mod for Q3 now a stand alone game, this game is a semi real but arcadey not unlike counter strike(but funner imo).

http://www.urbanterror.net/news.php

http://www.youtube.com/watch?v=0NrBLCcOt8k

cube

a quake like arena game thats open source.

http://cubeengine.com/

cube 2 sauerbraten

same type of game as cube 1 but this has better graphics and more maps.

http://cubeengine.com/

http://www.youtube.com/watch?v=PF2gAOiSz9U

open arena

a free game based off the Q3 engine so much so thet it is able to run almost all Q3 mods

http://openarena.ws/?about

warsow

another arena game (there is a hell of a lot of thees type games)

http://www.warsow.net/

http://www.youtube.com/watch?v=HefeGhlERCk

BTW

all most of all the big Q3 mods are stand alone games now thanks to the code being opened to the public

tremulous

a fun mash up of rts and fps games with a twist

http://tremulous.net/

http://www.youtube.com/watch?v=d-fMBBgA7LE

world of padman

never played this but have herd that this game is a fun arena game(again)

http://www.worldofpadman.com/

http://www.youtube.com/watch?v=oSa2BQOxt9E

ther are many more free games but thees are some of the best

o and for all of you mmorpg lovers out ther is

flyff

this is the funniest free mmorpg i have played

http://flyff.gpotato.com/.

O and cant forget

runescape

THE most played free mmorpg at the moment

http://www.runescape.com/

thats all of the ones i can think of the top of my head.

Hope this helps

and if you want to look for more here is some links

http://en.wikipedia.org/wiki/List_of_free_first-person_shooters

http://en.wikipedia.org/wiki/LIST_OF_FREE_MMORPGS

http://en.wikipedia.org/wiki/List_of_open_source_games

sry some of the links dont work