MXGP2 - The Official Motocross Videogame

Simply start Career Mode and pick easy difficulty. Once you race on the needed track, win the race, and the achievement will unlock.

Race tracks come in this order:
Losail
Nakhonchaisri
Neuquén
Pietramurata
Valkenswaard
Talavera de la Reina
Matterley Basin
Villars sous Ecot
Maggiora
Teutschenthal
Uddevalla
Kegums
Loket
Lommel
Mantua
Assen
Leon
Glen Helen