Currently, all weapons are one-handed: when a player equips them in his main hand, he can hold a bow or shield in his off hand. It would be cool to add two-handed weapons where this is impossible: they can only be equipped in the main hand, but only when the off hand of the player is empty. Also, it should not be possible to put items in the off hand slot while a two-handed weapon is equipped in the maind hand.

This has been implemented in KCI 12