1 - DeveloperScene
4 -  Unfavouritable
6 - ??
128 - NoPortables
256 - ??
258 - Uninvitable, DisallowGoto
262 - Uninvitable, Unfavouritable, DisallowGoto
390 - Uninvitable, Unfavouritable, NoPortables, DisallowGoto
512 - Group Joining