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Portal Lab Rats - Public

47 Members | 1 In-Game | 16 Online | 0 In Group Chat

Portal 2 co-op Map playing - Public

506 Members | 6 In-Game | 90 Online | 19 In Group Chat

Steam Trading Cards Group - Public

2,245,650 Members | 43,670 In-Game | 342,878 Online | 216549 In Group Chat

Steam Universe - Public

1,792,681 Members | 33,507 In-Game | 275,400 Online | 42545 In Group Chat