Saved game file (Generic)
SAV is a file extension used as a save file for a video game. SAV stands for SAVed file. A save file is typically used to track video game progress, though it is often possible to edit the contents of the file with a hex editor to cheat at the game.
Learn more about .SAV files:
See the entry for Saved Game at Wikipedia.
See answers to development-related questions at ITKnowledgeExchange.com.