I earned the last achievement a couple of weeks ago, namely the "Piece Of Cake" (Solve all puzzles in a region.). When I saw this game released I instanstly bought it, since this is the type of casual game that I really enjoy, and I knew my girlfriend would agree. The game is somewhat like sudoku just where you get some solving help by small equations around the board. It is really well done, and with 20000+ different boards some very easy and some very complicated there is plenty to do. I highly recommend this game to everyone who enjoy casual puzzle games as sudoku.