ONI Bog is the name of a cut multiplayer level, intended for an unreleased Halo 4 DLC alongside a Narrows remake and the cut map Arrowhead. Concept art for the map suggests it would have had a similar theme and tone to the map Abandon, though it is unknown if the two maps are one and the same, or simply similar.
- ^ ArtStation: HALO 4 - Oni Bog
- ^ ArtStation: HALO 4 - Oni Bog 02
- ^ ArtStation: HALO 4 - Oni Bog Structure Studies