You can add 8 courses to the Mario Kart 8 Deluxe game with the third wave of the Mario Kart 8 Deluxe – Booster Course Pass paid DLC* (downloadable content), available now exclusively for the Nintendo Switch family of systems. The newly added courses are Merry Mountain, Wii Maple Treeway, 3DS Rainbow Road, Tour London Loop, DS Peach Garden, Tour Berlin Byways, 3DS Rock Rock Mountain, and GBA Boo Lake! You can learn more below.