Open all star lockers

Knock on Iván's door 10 times

Look at Ivan's picture 5 times

Kill two or more enemies at once (not Carnitos)

Kill three Carnitos with one hit

Escape from a Vorax to another room before he explodes

Keep going down the endless corridor

Pick up the iron pipe

Find all 3 film canisters

Drink Lavendoleum while having full health

Complete the game using only the wrench

Defeat the carnitos without getting hit

Defeat Obscuratus using only the wrench

Defeat Fumus using only the pipe

Fill the silver bottle by removing 3 save points

Read all the pages of the old book

Get Ending #1

Get Ending #2