To unlock this trophy, you must win the Quad Nations competition. The trophy will unlock when you have finished the competition.
It is easiest if you play as a high-rated team (New Zealand or Australia) on very easy. You can simulate the matches, and it is much quicker if you do. An easy way to simulate the matches quickly is to press (or ) to switch tabs to Fixtures and press or to bring up My Team. You can scroll down to the final match and press to simulate the matches up to that point. You will need to manually simulate the matches after pool play has finished. For extra security, you may wish to actually the play the final knockout matches instead of risking simulating and losing. If you simulate them, however, the trophy will still unlock.