Here is the full list of all 19 Mustache in Hell achievements.
Read all books
Defeat Kraken
Defeat the giant spiders
Got the Genesis controller
End the first five areas of the Tombs without using secondary weapon
Defeat Ciacco
Beat the first three areas of The Fall of Guilt with only the pistol
Defeat Cereberus
Defeating Cerberus without sprinting
Defeat Charon
Got the Atari joystick
Got the NES controller
Got the SNES controller
Got the Game Boy
Got all controlles
Reach the Cerberus without get a hit
Complete the Styx Waters without being hit by a saw
Don't die facing the Kraken
Don't die facing the Charon