A bag for holding the wild mammals or birds killed during a hunting or shooting expedition:they come back as happy as hunters with bulging game bags...
Nearby lay a game bag, through the meshes of which was seen the plumage of shot birds.
It's a very well-made coat - it has a game bag that folds out of the back.
My father and his friends would assemble in our yard with dogs, cartridges and game bags, and head off across the fields to the first location.