History-making game? (8)
I believe the answer is:
napoleon
'game?' is the definition.
(I know that Napoleon is a card game)
I don't understand the remainder of the clue.
Can you help me to learn more?
(Other definitions for napoleon that I've seen before include "In France, former sovereign" , "dictator" , "Frenchman known as The Little Corporal" , "French general and emperor" , "Old French coin" .)