Zombie Panic Fans!
676 Members - 0 Chatting, 48 In-Game, 161 Online

4chan
7,345 Members - 1 Chatting, 351 In-Game, 1,806 Online

FacepunchStudios
13,514 Members - 4 Chatting, 1109 In-Game, 3,724 Online

Adamant RP
4 Members - 0 Chatting, 1 In-Game, 2 Online

Wireplay TF2
1,606 Members - 0 Chatting, 143 In-Game, 441 Online

THE EPIC COMMUNITY OF EPICNESS!
24 Members - 0 Chatting, 6 In-Game, 11 Online

FacePunch Builder's Union
255 Members - 0 Chatting, 20 In-Game, 82 Online

Facepunch Slavehack
80 Members - 0 Chatting, 8 In-Game, 31 Online

ShadowUK
39 Members - 0 Chatting, 5 In-Game, 17 Online

adrian7813 Fan Club
11 Members - 0 Chatting, 0 In-Game, 3 Online

Doorman is God
62,483 Members - 0 Chatting, 3164 In-Game, 11,704 Online

GW Channel
67 Members - 0 Chatting, 3 In-Game, 14 Online

Meerkat's Members
24 Members - 0 Chatting, 4 In-Game, 12 Online

Flameounch Studios
15 Members - 0 Chatting, 3 In-Game, 8 Online

Jake's Forum
5 Members - 0 Chatting, 0 In-Game, 2 Online

Blitzkrieg Doctrine
66 Members - 0 Chatting, 6 In-Game, 25 Online

Battle Royale gamers
304 Members - 0 Chatting, 26 In-Game, 84 Online

Swedish Gamers Group
13 Members - 0 Chatting, 5 In-Game, 7 Online

GMod Moo-V Creating Group
8 Members - 0 Chatting, 2 In-Game, 5 Online

The Stoned Potatoes
176 Members - 0 Chatting, 33 In-Game, 73 Online

::]Project-X[:: Build Server Group
11 Members - 0 Chatting, 2 In-Game, 6 Online

Cult of Dr.C
44 Members - 0 Chatting, 3 In-Game, 12 Online

Black Mesa Austria
15 Members - 0 Chatting, 3 In-Game, 6 Online

[Phosphorus]
33 Members - 0 Chatting, 1 In-Game, 11 Online

~Desu!
48 Members - 0 Chatting, 2 In-Game, 15 Online

Project Blue
5 Members - 0 Chatting, 3 In-Game, 5 Online

MaD-DoS CHUGGA CHUGGA group
10 Members - 0 Chatting, 0 In-Game, 8 Online