Zill O’ll Infinite is an enhanced version of Zill O’ll. The gameplay system and the layout of the locations remain unchanged. The graphics are technically more advanced, with more detailed 3D character models and sharper-looking pre-rendered backgrounds. A few events have been altered, and in some cases different requirements must be met to advance relationships with certain characters. This version also introduces new characters, raising the amount of possible endings to 48 (as opposed to 24 in the original release). It also has a New Game+ feature which effectively adds a new opening scenario to the story.