Ok, so, bit of a long story....
On it's release day, I bought the Peril of Gorgon DLC. However, all my save files were after the point of no return - the final stages of the final mission.
Therefore, I was unable to leave Tartaurus and start the DLC. I ended up having to get a refund for the DLC through the xbox website, which was accepted within an hour.
I knew that the only way for me to get to play the DLC would be to start the game again and get to the start point for it.
I left it a couple of days and then started a new game.
Although I had been refunded for the g