The Johnny Dog War is a game made by Overclocked that features Johnny Dog and is part of Series Swap Day 5.
It's plot involves Johnny Dog going against all of the gods and entities in every mythology (or at least close enough) to stop a huge threat that will end existence.
Johnny Dog is just chilling with his girlfriend when all of the sudden Thor shows up at his house, saying that a dude from the multiverse is going into other multiverses and sending his undead army through. With his portals raising all of the dead, they fear he will wake up a massive threat locked away a long time ago.
Johnny and Lady Kit go off to save the multiverse of multiverses, but first off they need to find the evil dude. They stop at Portalguru and head towards Gold Hills.