Top 10 Multiplayer PC Games to Play Before You Die

As the title says...Which are your favorites? Which do you think everyone should experience at least once?-Must be for the PC-Must be Multiplayer-Limit of two MMOsTop 10 Multiplayer PC Games to Play Before You Die
Team Fortress 2Top 10 Multiplayer PC Games to Play Before You Die
Left 4 Dead
1. Cod4

2. Cod5

3.TF2

4. Halo CE

5. Left 4 Dead

6. Any MMO except for WoW. Yes, that just happened
Halo pc
CSS, TF2, L4D, BF2, Tribes 2, Enemy Territory and America's Army.
10. Call of Duty 2
9. Day of Defeat: Source
8. Team Fortress Clasic (spelled wrong because I was edited)
7. Warcraft 3
6. Gunbound
5. Medal of Honor: Allied Assault
4. Counter Strike Source
3. Team Fortress 2
2. Left 4 Dead
1. Starcraft
TFC

bf2 or bf2142

l4d

cs or cs:s

guild wars

Tribes or Tribes 2

Diablo

UT or UT2k4

Q3A
1. Age of Conan2. Age of Conan3. Age of Conan4. Age of Conan5. Age of Conan6. Age of Conan7. Age of Conan8. Age of Conan9. Age of Conan10. Age of Conan
1. Guild Wars Nightfall

2. Guild Wars Eye of the North

3. Guild Wars Prophecies

I can't say about factions, I don't have it...
L4D, BF2, TF2, AA.
[QUOTE=''nutcrackr'']TFC bf2 or bf2142 l4d cs or cs:s guild wars Tribes or Tribes 2 Diablo UT or UT2k4 Q3A[/QUOTE]^this
Cod4

CSS

TF2

L4D
UT'99 / CS(1.6|S) / Hexen|Heretic / Quake (1|2) / WoW i geuss
1] Quake Live2] Team Fortress 23] Counter Strike source4] Age of Empires5] EvE Online6] MechWarrior 47] Starcraft8] Company of Hero's9] Left For Dead10] Age of ConanNotnecessarily in that order.
1) CSS (or 1.6)2) DOD:S (Or standard)3) Starcraft4) DOW 1 (with all expansions)5) Heroes of might and magic 36) Natural Selection (2 comming out this year it seems, which is a better version it seems)7) Neverwinter nights8) COD29) Quake 2 (still better then Q3 in my book)10) Everquest 2 (I really wanted to say WoW, but in my mind EQ2 still beats it)
flatout 2. best mp racing game ever. its nice to have something better than just racing. personally i enjoy it because i play ''dirty''. disabling others cars and whatnot.
1-World Of Warcraft2-Battlefield 23-Diablo4-Crysis Warhead5-The Orange Box6-Bioshock7-Doom8-COD4/29-Left 4 Dead10-Theif ll
RuneScapeLeft4DeadTotal AnnihalationWoWCounterStrikeUnreal Tournament
In no partifular order:1. Team Fortress Classic2. TF23. Starcraft4. Diablo 1-25. World of Warcraft6. Duke Nukem 3d7. Shadow Warrior8. Battlefield 19429. Day of Defeat - HL2 mod10. Unreal Tournament