This is an English translation patch for Mississippi Satsujin Jiken, the Famicom port of a Western 8-bit computer game named Murder on the Mississippi.

The original game was released on the Apple and Commodore 64/128 by Activision while the port was released by Jaleco, all in 1986. It is a Western-style adventure game wherein the main character is an accomplished British detective who investigates a murder aboard a Mississippi riverboat that he coincidentally happens to be on. The game uses a fairly simple interface to interact with the various objects and suspects on the boat, and is pretty short once you know what to do, though getting to that point is not an easy matter.