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Steam Trading Cards Group - Public
2,222,934 Members   |   52,821 In-Game   |   390,583 Online   |   208532 In Group Chat
TF2R.com Development Group - Public
20,398 Members   |   488 In-Game   |   3,260 Online   |   154 In Group Chat
Steam Family Sharing - Public
865,132 Members   |   19,903 In-Game   |   164,790 Online   |   7911 In Group Chat