Darkfall The Other Dimension

Taking place a few years after Leon had managed to run away using the help of a mysterious man. Nergal was using his portals, but something went wrong. Nergal, Mephisto, Deus, and Beryl fell into another dimension in a timeline, which was way back in the past. The dimension might have been where Leon came from, they thought. They must get back to Darkfall, and they will need the help of those who come from this dimension.

The dimension their on is Leon's original dimension, but the problem is that Nergal's ability messed something up and got telpprted there in past settings. When Leon was a teenager and never even met them.