"and forms part of the Ivalice Alliance" - I think this could be presented better for people unfamiliar with the series, perhaps explicitly describing Ivalice as a fictional universe
" and Judges supervising battles" - this is confusing to people unfamiliar with the series, you'll have to present it better in the lead if you want to keep it there
"were later used in mobile titles" - I'd wikilink 'mobile titles' to 'Mobile game'
"which cost Clan Points" - your going to have to explain what Clan points are if you want to keep this
"a series of titles released principally" - guessing the period before this is supposed to be a comma?