NowGamer reviews Kingdom Hearts:Birth by Sleep on PSP - "Disconcerting is the sight of Mickey Mouse wielding a keyblade, shooting off into the skies with his trademark ‘oh hoo!’… noise. Disconcerting is how these seemingly normal three main characters can’t seem to be able to discern the bloke voiced by Leonard Nimoy is quite clearly evil. Disconcerting is Donald Duck in general, but that’s by the by. But just because there are a few things about Kingdom Hearts: Birth By Sleep that leave us ever-so-slightly uncomfortable, that doesn’t mean it’s a bad game. Far from it, in fact."