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Steam Trading Cards Group - Public
2,276,122 Members   |   31,328 In-Game   |   311,554 Online   |   225393 In Group Chat
TF2R.com Development Group - Public
20,315 Members   |   240 In-Game   |   2,139 Online   |   168 In Group Chat
Steam Family Sharing - Public
865,910 Members   |   8,946 In-Game   |   113,125 Online   |   8569 In Group Chat