you have just completing the levels as medium and completing all of them perfectly a medium as well. It doesnt make sense to me. If completing all with gold is too easy for a hard than just completing them all should be an easy achievement. Of course it'd be nicer if completely all with a a gold was a hard achievement.
 "Legend of the Void"){kind=icon}
 "Red Crucible 2"){kind=icon}
 "Burrito Bison Revenge"){kind=icon}
 "Sushi Cat"){kind=icon}
 "Frontier"){kind=icon}
 "My \"Dear\" Boss"){kind=icon}
 "Kingdom Rush"){kind=icon}
 "Adventure Story"){kind=icon}
 "Bunny Charm"){kind=icon}
 "Creeper World: Evermore"){kind=icon}
 "Badge Master"){kind=icon}
 "Sieger: Level Pack"){kind=icon}