This is relevant to 04/02/2013 update of Half-Life: Blue Shift and Half-Life: Opposing Force that added chapter names to Load Game and Save Game dialogs instead of map names.
In Half-Life: Blue Shift, the "Hazard Course" chapter mistitled as the "Power Struggle".
In Half-Life: Opposing Force, map of0a0 must be the only map of the "Incoming" chapter, not of the "Opposing Force". Also, the "Welcome to Black Mesa" chapter actually starts from map of1a1, not from of1a3.
This is relevant to 04/02/2013 update of Half-Life: Blue Shift and Half-Life: Opposing Force that added chapter names to Load Game and Save Game dialogs instead of map names.
In Half-Life: Blue Shift, the "Hazard Course" chapter mistitled as the "Power Struggle".
In Half-Life: Opposing Force, map of0a0 must be the only map of the "Incoming" chapter, not of the "Opposing Force". Also, the "Welcome to Black Mesa" chapter actually starts from map of1a1, not from of1a3.