Egis Reversible Game Save |link| Jun 2026

This paper formalizes ERGS, compares it to existing systems (quicksave/autosave, rewind mechanics in Braid / Prince of Persia ), and provides a reference implementation.

Click the action you want to undo. For the king example, you would reverse the dialog choice. The game recalculates the state. The king now smiles. Your reputation is restored. You never died. , the trap damage and the rusty key remain untouched. You have reversed the timeline surgically. egis reversible game save