SoulCalibur

Unlock 3rd Costume:
When you have beaten Arcade mode once with the corresponding character you will unlock their 3rd costume.

Maxi's 3rd Costume:
Beat Arcade mode as Maxi.

Siegfried's 3rd Costume:
Beat Arcade mode as Siegfried.

Sophitia's 3rd Costume:
Beat Arcade mode as Sophitia.

Voldo's 3rd Costume:
Beat Arcade mode as Voldo.

Xianghua's 3rd Costum:
Beat Arcade mode as Xianghua.

Unlock Arenas:
Complete the following tasks to unlock the corresponding arena.

City of Water:
Finish Arcade mode 6 times with a different character each time.

Colloseum:
Finish Arcade mode 8 times with a different character each time.

Water Labyrinth:
Finish Arcade mode 4 times with a different character each time.

Unlock Characters:
The following characters become unlocked when you complete the corresponding task.

Cervantes:
Finish Arcade mode 10 times with a different character each time.

Lizard Man:
Finish Arcade mode 3 times with a different character each time.

Rock:
Finish Arcade mode 7 times with a different character each time.

Seung Mina:
Finish Arcade mode 9 times with a different character each time.

Siegfried:
Finish Arcade mode 5 times with a different character each time.

Yoshimitsu:
Finish Arcade mode 2 times with a different character each time.

Hwang:
Finish Arcade mode once with any character.

Inferno:
Finish Arcade mode with Edge Master.

Edge Master:
Finish Arcade mode with every character (including hidden ones).