Haunted Castle is a Castlevania game released in arcades in 1988. This time, Dracula has kidnapped Simon Belmont's wife, and it's up to him to save her. This game is also infamous for being extremely difficult, especially on version M, where Simon can lose half of his health when getting hit by certain enemies or projectiles (that is, the majority of them) on default settings, whilst only giving the player one life.
zggzdydp plays on Version K, which has a more manageable difficulty (mainly enemies not hitting like tanks), allowing for several damage boosts, and rescues Simon's wife in record time.