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Steam Trading Cards Group - Public
2,260,554 Members   |   64,832 In-Game   |   448,922 Online   |   220547 In Group Chat
TF2R.com Development Group - Public
20,344 Members   |   444 In-Game   |   3,063 Online   |   170 In Group Chat
Steam Family Sharing - Public
865,060 Members   |   19,014 In-Game   |   163,561 Online   |   8353 In Group Chat