Full version of the game (v1.5)
"1989 - Gordon Ruger died in a car accident." That's what's written on his tombstone. He's left a son and a daughter orphans since then, but they KNOW it wasn't a simple car accident. And they know that because they were taught, since they were kids, everything about supernatural creatures and phenomena by their father. It was a demon, no doubt about it. Either way, at that time, John and Sarah were too young to even have a chance to fight against this demon, which they didn't even know. Six years after his death, after an incident, probably planned by the demon, they decided to hunt him down.
On your hunt of revenge, you're in control of John and Sarah.