This goes by European release dates because...duh. That means no Persona 4 Arena, as much as it breaks my heart to say it. Anyway, you probably won't read much of this, but I enjoyed putting this together a lot! So many good memories this year!
Although there's a lot of games I regret not playing this year. XCOM and Layton 5 in particular would have probably made this list, but ah well. Another game I played a lot this year, Theatrhythm: Final Fantasy, just missed the tenth spot as well, but you should really give that game a shot if you own a 3DS!