Here's the list of achievements: 10pts. Stage 1 Cleared: complete stage 1 in any difficulty.
10pts. Stage 2 Cleared: complete stage 2 in any difficulty.
10pts. Stage 3 Cleared: complete stage 3 in any difficulty.
10pts. Stage 4 Cleared: complete stage 4 in any difficulty.
10pts. Stage 5 Cleared: complete stage 5 in any difficulty.
10pts. Stage 6 Cleared: complete stage 6 in any difficulty.
50pts. Easy Difficulty Mode Cleared: complete all stages in easy mode.
100pts. Normal Difficulty Mode Cleared: complete all stages in normal mode.
150pts. Hard Difficulty Mode Cleared: complete all stages in hard mode.