SOG may refer to:
- S.O.G. - The fifth campaign mission of Call of Duty: Black Ops.
- Studies and Observation Group - A protagonistic faction of Black Ops led by Frank Woods, also appearing in multiplayer.
- SOG Knife - A knife that appears in Call of Duty: Black Ops and Call of Duty: Black Ops II mainly used by the members the Studies and Observations Group.
- SOG Rules - An achievement/trophy in Call of Duty: Black Ops.