English
aftergame
From after- + game.
Proto-Germanic *gamaną ‘amusement, pleasure’
Proto-West Germanic *gaman ‘pleasure, fun, amusement’
Old English gamen ‘sport, game, pastime’
Middle English game
English game
Today it means
noun A second game played to reverse the outcome of the first; the means employed after the first turn of affairs.
Language periods are conventional ranges, not dates for this word.
Etymograph / aftergame