What is "aftergame"

Aftergame \Aft"er*game`\, n. A second game; hence, a subsequent scheme or expedient.
--Wotton.

Aftergame at Irish, an ancient game very nearly resembling backgammon.
--Beau. & Fl.

n. A second game played to reverse the issue of the first; the means employed after the first turn of affairs.