Possible to make a route transition inside of a service in Ember?

I'm using ember-cli 1.13.8 and I have a service that handles most of my logic. Right now I have a function that listens to whether certain things are true or false and then can make a route change based upon that. I'd rather not have to call that function from inside every route since I want it to happen on every route. Its goal is to determine whether the player won and every interaction in the game drives this.

Inside of my game service:

init() {
  ... 
  if(true) {
    console.log("you've won!");
    this.transitionTo("congratulations");
  }
},

Of course, this fails because this isn't a route like Ember expects. I know I can call this method from inside of every route instead but I'm wondering if there is a better way to do this.

Thanks

Edit

So far I've tried importing in the App and then trying to extend the Router. This seems like a bad idea though.