Once you beat set, start the game again grab the sword in the first level then go to the place where you have to use the mysterious amulet.
Before you use the amulet pause the game, and hold r1 and press x, o, o, triangle, triangle, x.
Then you should hear a message should come up saying INVALID CODE.
Don't worry, then unpause turn to the opposite direction of the warp god and there should be a door.
Go through it and there will be a chest open it and you will get the jump of Anubis.
By holding x, you can keep rising upwards.
Have fun from you friendly neighbourhood cheat master.