Successfully complete the indicated task to unlock the corresponding achievement.

Achievement	How to unlock
Arcade Clear	Clear Arcade Mode on any difficulty.
Arcade Clear: Hard	Clear Arcade Mode on Hard (or higher.)
Arcade Clear: Normal	Clear Arcade Mode on Normal (or higher.)
Arcade Clear: Very Hard	(Secret)
Challenge Mode Amateur	Defeat a boss in Challenge Mode.
Challenge Mode Champ	Defeat three bosses at once in Challenge Mode.
Lurking Offscreen	Find a hidden health pickup in Arcade Mode.
S-Rank: Level 1	Clear Level 1 with a final rank of S.
S-Rank: Level 2	Clear Level 2 with a final rank of S.
S-Rank: Level 3	Clear Level 3 with a final rank of S.
S-Rank: Level 4	Clear Level 4 with a final rank of S.
S-Rank: Level 5	Clear Level 5 with a final rank of S.
S-Rank: Level 6	Clear Level 6 with a final rank of S.
S-Rank: Level 7	Clear Level 7 with a final rank of S.
SSS-Rank: Level 1	Clear Level 1 with a final rank of SSS.
SSS-Rank: Level 2	Clear Level 2 with a final rank of SSS.
SSS-Rank: Level 3	Clear Level 3 with a final rank of SSS.
SSS-Rank: Level 4	Clear Level 4 with a final rank of SSS.
SSS-Rank: Level 5	Clear Level 5 with a final rank of SSS.
SSS-Rank: Level 6	Clear Level 6 with a final rank of SSS.
SSS-Rank: Level 7	Clear Level 7 with a final rank of SSS.
Story Clear	Clear Story Mode on any difficulty.
Story Clear: Hard	Clear Story Mode on Hard (or higher.)
Story Clear: Normal	Clear Story Mode on Normal (or higher.)
Story Clear: Very Hard	Clear Story Mode on Very Hard.
Who's Laughing Now?	Clear the game with the joke character.