Zill O'll Infinite Plus is an enhanced portable edition of Zill O'll Infinite released for the PSP. In addition to carrying over the content of the PlayStation 2 version, it introduces a new starting scenario, more recruitable characters, additional story events and further character-specific routes. More than 120 new events were added, along with new scenarios and endings, bringing the total number of possible endings to 53. Several gameplay systems were also adjusted to make progression and repeated playthroughs more convenient.