Rewind

Rewind is an emulator feature that lets you scrub backwards through the last few seconds (or minutes) of gameplay, undoing your last actions. It works by recording a save state every N frames into a circular buffer; pressing "rewind" loads progressively older states until you release. Useful for retrying a fall, missed jump, or wrong dialog choice without losing major progress. Memory cost is moderate — a typical NES rewind buffer of 60 seconds at 1 state per 4 frames is ~30 MB.