alright its kinda like the legacy of goku series of games. its a series of games. they each have story mode vs mode and free play mode.
game 1:one piece: romance dawn
-story mode would be morgan arc-lougetown arc(ive made levels,but i wont list them)
-i dont want to list all the charcaters in vs mode but there are 32
-free mode u can go play any of levels with any character u want. also there are bonus levels.
(if u played legacy of goku 1,2,3 for the gba u should know how story mode works.gain levels etc. also vs mode is like bodokai gain skills for costum mode, but whats different is the levels the characters in vs. like lets say u beat story mode and your luffy charcter would be at level 20 for vs mode. dont worry u can bulid up their levels is free mode to make it fair :P. and thats about it… oh and their will be sequlis. i will post game 2 and 3 later)
edit: an mmorpg wouldd also be fun, where u create your own character and form your pirate crew with other players, i wont go into to much detail because there are already two theards like that