If u go through the door nxt 2 the door w the blood on it 1st u wont b able 2 get all keys an loot. U have 2 go thru the door on the left of the cube u put the lithograph in 1st so that u can cut the gas off THEN wen u finish an get back 2 the cube go thru the other door an wen u get 2 the manual switch that makes the monsters come outta the door go thru that door they came out of an u will now b able 2 go dwn the steps w/o dying from the gas.
If u go through the door nxt 2 the door w the blood on it 1st u wont b able 2 get all keys an loot. U have 2 go thru the door on the left of the cube u put the lithograph in 1st so that u can cut the gas off THEN wen u finish an get back 2 the cube go thru the other door an wen u get 2 the manual switch that makes the monsters come outta the door go thru that door they came out of an u will now b able 2 go dwn the steps w/o dying from the gas.