Shin Megami Tensei if...

One of the lesser known titles in the Shin Megami Tensei series. It contains the same elements of other games in the series, but follows a story of what would have happened if the events of the original Shin Megami Tensei had ended differently.

Revisional Differences
Two different revisions of the game ROM are known to exist. Version 1.1 (or "revision 1") was burned onto an EPROM which originally contained the Japanese version of Kirby's Dream Course, also known as Kirby Bowl. As a result, unused regions of the ROM are filled with leftover data, code and text from Kirby Bowl, including the text from the debug mode, several chunks of level data, and probably other assorted leftovers.