Cue sheet (.cue)
A cue sheet, or cue file, is a metadata file which describes how the tracks of a CD or DVD are laid out. Cue sheets are stored as plain text files and commonly have a ".cue" filename extension.
Examples
Systems like the PSX require you to load them through CUE sheets. Most rips come with these, but in case yours didn't, a template is shown:
FILE "GAME NAME [1] US.bin" BINARY TRACK 01 MODE1/2352 INDEX 01 00:00:00
Replace GAME NAME [1] US.bin with whatever your game's file name is, but keep the quotation marks. Load the .cue file in RetroArch under Normal ROM to start the game.
Multi-track game
Fill this in.