About Critical Uplay is: Sir_critic4l needs clan Games Played Clans 2287 Players 701 Rainbow Six Siege Tom Clancy's Rainbow Six Siege is a tactical shooter video game developed by Ubisoft Montreal and published by Ubisoft. Platforms Owned PC Browse our extensive list of clans for PC players. This section includes players / clans for a wide range of custom personal computers. Owned Clans