RDB is a small file that stores Nintendo 64 game ROM database. RDB files can store N64 and Z64 documents. Besides holding list of available game, the format allows emulators to recognize some of the least known game titles and manage setting for those games.

RDB documents are compatible with most Nintendo 64 emulators for Windows and Mac systems. Game database updates can be found on various internet forums or services such as Github. RDB format can also be used as basis for database formats for games available on other game consoles.