Buy The LEGO® NINJAGO® Movie Video Game - Microsoft Store
Find your inner ninja with the all-new LEGO NINJAGO Movie Video Game! Play as your favorite ninjas to defend Ninjago from the evil Lord Garmadon. Master the art of Ninjagility by wall-running and high-jumping, and battle foes to rank up and upgrade the ninja's combat skills.
www.microsoft.com
Not sure why it's free exactly, but I'll take it