level or mission, or in fighting games, it might save after winning a match. Such points are called savepoints; sometimes the distinction from a checkpoint is blurred. Some games use autosave as the only method of saving data, and the player must complete a set amount of the game before saving takes place. Still another use of autosaving is as an anti-cheating device; for example, in every Mega Man Battle Network sequel, the chip trader machines autosave upon giving out a new battle chip so the player can't cheat by soft resetting after each try of the chip trader until the desired chip is received. A more serious downside of autosaving is that it can prevent the player from completing a game if a save operation fails due to a sudden cessation of game operation, whether by a crash, freeze, or power loss of the gaming system (resulting in the save file being corrupted), or if a successful autosave preserves the effects of a game-breaking bug or a player mistake (such as making a wrong decision in a game with multiple endings or losing a critical character permanently) that otherwise renders the game unwinnable. See also Persistent state References Backup Video game terminology