Scythes were never used in history as actual weapons. Why use something to impracticable when a Polearm does the same thing? Scythes are just way too unbalanced and top heavy to make an effective weapon.
Sickles however? Yes there are plenty of examples in historical manuals depicting various European Martial Arts (usually in Germany and Italy), as well in various Asian Martial Arts (Mostly South East Asia). The point of balance is in a position where they are much more nimble and less tiring to use in combat.
EDIT: Also whoever mentioned Chinese Swords? YES! A dozen times yes! I would love to see a good Dao in this game. Dynasty Warriors has me in love with the Dao and the Jian (even if the Jian wasn't used in combat)
Sickles however? Yes there are plenty of examples in historical manuals depicting various European Martial Arts (usually in Germany and Italy), as well in various Asian Martial Arts (Mostly South East Asia). The point of balance is in a position where they are much more nimble and less tiring to use in combat.
EDIT: Also whoever mentioned Chinese Swords? YES! A dozen times yes! I would love to see a good Dao in this game. Dynasty Warriors has me in love with the Dao and the Jian (even if the Jian wasn't used in combat)