Unlock Customizable Options Menu: In Empire mode complete the Yellow Turban campaign.
Unlock 4th Weapons: Upgrade your Blacksmith skill in your chosen weapon to level 4 then in battle get 500 kills. You will then be awarded the weapon when you have beaten the level.
Unlock Extra Item Slot and 1000 KO Medal: Earn 1000 KOs with any character in any difficulty in any stage in either Free or Empire mode. That character will get a medal for 1000 KOs and also an extra item slot. The character does not have to be Max Rank to gain the item slot and will have a total of 6 item slots at Max Rank.