Edit - PS4 version is free again!

Free a few days ago for PS4 and now appears to be free now for XB1. Grab it now!

If you can’t get it from the Australian store then try the Japanese or Korean stores as it will be available till May 10. No VPN required.

Connect to your Microsoft account (stay in the Japan store) Click on the "Get" button - the game is then added to your account

The much-awaited sequel to Pac-Man Championship Edition! Featuring eye-popping 3D graphics and funky visuals, the latest version of the classic game takes chomping and chasing through mazes to a whole new level! Make up to four ghost trains for maximum chompage! New modes include Score Attack and an Adventure Mode with fast fleeing fruit, big bad bosses, ridiculous remixed rules, and more!

Credit to HUKD