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Steam Trading Cards Group - Public
2,258,444 Members   |   32,239 In-Game   |   305,037 Online   |   220255 In Group Chat
TF2R.com Development Group - Public
20,343 Members   |   255 In-Game   |   2,288 Online   |   170 In Group Chat
Steam Family Sharing - Public
864,347 Members   |   9,392 In-Game   |   114,408 Online   |   8346 In Group Chat