OOG

From ILB

Out-Of-Game. Used to refer to something that might look like part of the game, but isn't. This web site, for example, is entirely OOG. In this ARG in particular, OOG may also refer to Haloverse knowledge that has not yet specifically appeared in the ARG itself.

Please note that just because something is currently OOG does not mean that it will not ultimately become in-game.