Good LAN games?

[SmokeySpartacus]

Anyone here who knows some games that are good for LAN-parties (i'm talking about the small ones with 4-12 people)

I have a list of games that are funny at LAN-parties already, but i want it expanded.

Postal 2 MP (dunno why it's funny at LAN parties but it really is IMO :P)
SWAT 4.
TF2 (sometimes only though)

So, thanks if you wanna expand the list for me :)

[Orkel]

SvenCoop, a mod for HL1. Then there's both Serious Sam games and IL2.

[McNab]

serious sam the second encounter

[RSahlgren]

Jedi Outcast/Knight series (1 & 2).

[Uncle_Earl]

Any game in the quake series.

[Jax Strife]

Saints row 2. Epic co-op.

[MrJazzy]

Starcraft

[FullStreak]

I liked Battlefield 1942.

[kelmar]

diablo 2

[dewd11]

Operation Flashpoint
Warcraft

[joost1120]

Swat 4

[Factory]

I second Saint's row 2.
And COD4

[sami-pso]

[url]http://www.warsow.net/[/url]

[Spiderface]

Diablo mothafuckin' two.

[Overpowered]

Call of Duty 2 or 4