Ring all the Hell Bells.

Obtain every Corb Trophy.

Collect your first Secret Corb.

Collect all Secret Corbs.

Talk to a Sleepwalker.

Obtain all 4 Sleepwalker Items.

Defeat Infernus and unlock the exit.

Clear all of Infernus's battle phases in a row without taking damage.

Pause the game close to I.C.

Defeat 10 enemies at once using the Ultimate Slash.

Melt one of the peaceful Ice Qyoobs living in the big icy lake in South Unmountain.

Lose a life to a Monolith without dying.

Reach 30 lives.

Reach either credits after obtaining all Corb Trophies, Secret Corbs, and Sleepwalker Items.

Find The Uhmmt.

Ring the two secret Hell Bells.

Unlock all achievements.