Lost saga was an MOBA/lobby/chat/team game. If you want you can find it on wikipedia. It is now shutdown. Basically, it uses heroes/characters from life,historu,sci-fi, fantasy, video games etc. and you play as them. Batle it out in a stage on a team, play deathmatch, boss mode, crusade etc. it was was one of my favorites. I can see the possibility for it to be a FF/story cross rp.
Basically you can take an OC from any fanfiction or story, and post it below for a chance to play. Here is how it will go. You have a char made. There will be one big lobby where all the chars can hang out and chat. If you wish to have a match with another player just ask em.
Here is a bio template: