Here is the full list of all 16 Mute Crimson achievements.
Defeat Space Squid
Got A Coin
Defeat Moth
Defeat King Eye
Defeat Super Computer
Defeat Robo Squid
Defeat Pure Demon
Defeat Demon Wall
Got Half Of The Coins
Got All Of The Coins
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