Save Glitch - lost ending

[willitsunday]

I was wondering if there was anyway to access previously saved versions of the game. I was towards the end of the game, so some of this description may contain some mild spoilers. So I was playing (Maybe a mild spoiler, I guess: I was crossing a bridge to what looked like a Mayan temple in the center of the machine) and had to leave the game, so I "Saved and Exited". When I went back to continue the game, it was apparently all the way at the end, the continuation started with a quote popping up on screen, a short little video played, the title came up on screen (spoiler again, I guess, and then game just restarted, so I never got to go into the temple thing or play anything past the bridge going into it). I wanted to know if there was a way to continue a previously saved version of the game so I don't have to start from the beginning just to play the ending and my last saved game apparently has a glitch. Any help would be appreciated, thanks!!!