File saved by ZSNES, an SNES emulator for PCs; contains an emulated save state of game progress; can be used to save and load game progress at any point during a game. Ten save slots are allowed in ZSNES (file extensions ZS0 through ZS9). Change the game save state by pressing the "F3" key and using the arrow keys to navigate to one of the 0-9 states, or select the "Pick State" option under the "Game" menu.