Sounds like you unlocked everything if you have the party and library options on the main menu.
The peg leg is a Diablo 2 reference for a stupid little easter egg. Combine it with the witch's tome and then combine it with the cube.
Viewing post in Kink Jinxed Halloween 3 comments
Ah ok! I don't actually have the library option unlocked and I'm not sure how to do it. I've beaten the game on hard mode twice and got the mysterious person(I forget his name) scene, but no library unlock. To be more accurate I didn't get the scene that reveals who he is like I did after I beat the game the second time.