Yi Shu suits
Condition 1: Complete the task-Bajk's promise.
Condition 2: It takes 50 pieces to find silica in ancient tombs (I estimate that there are 5 pieces in ancient tombs and 6-8 pieces in ancient institutions).
Condition 3: Go behind the Sphinx with a hole in the bottom left corner. After entering, complete the interaction and add silica gel.
Roman legion suit
Conditions: Complete the challenge of Cyrene Gladiator Arena and pay attention to Cyrene Arena.
Black hood
Conditions: you can get it by completing the bodyguard's prey task.
Coastal national costumes and northern national costumes
Conditions: Buy in a textile shop.
Aigio suit and Artell suit.
Condition 1: You can get the Aigio suit through Assassin's Creed series works.
Condition 2: You can get an Artur suit through two Assassin's Creed series works.
Desert cobra suit
Conditions: It seems that there is only an early release or deluxe edition.
Hermite suit
Conditions: Complete the Goddess of Killing mission to get it.
Assassin's Creed: Origin