Here is the full list of all 16 Mute Crimson achievements.
Got All Of The Coins
Defeat Demon Wall
Defeat Pure Demon
Got Half Of The Coins
Defeat Robo Squid
Defeat Super Computer
Defeat King Eye
Defeat Moth
Defeat Space Squid
Got A Coin
Finish Arcade Mode
Finish Arcade Mode In Under 60 Minutes
Finish Arcade Mode In Under 45 Minutes
Finish Mute Crimson Classic
Finish Boss Rush Mode
Acquire All Achievements