The CHAIN LEVEL PACK Add-on for SUDOKU has 10 achievements.
Open Level 10 [DLC]
Open Level 9 [DLC]
Open Level 8 [DLC]
Open Level 7 [DLC]
Open Level 6 [DLC]
Open Level 5 [DLC]
Open Level 4 [DLC]
Open Level 3 [DLC]
Open Level 2 [DLC]
Open Level 1 [DLC]