Game rom dùng bởi Máy mô phỏng Nestopia chơi Video Games của Nintendo Entertainment System (NEST) video game;cũng được dùng để chơi game Famicom, which was the Japanese version of the NEST.

The Universal NES Image Format (UNIF) is an alternative to the .NES format for storing NES and Famicom images. It was originally developed by Tennessee Carmel-Veilleux but then abandoned in 2008. Since 2011, the UNIF format has been maintained by the libunif project and. NOTE: The UNIF file extension is not as common as the .UNF extension.