This is obvious spoiler for the game and what I tried so far for those 2 achievements. I got all secret door open and still didn't get anything "new", I couldn't use the USB on anything I thought, Now I ended the game with the normal ending, nothing really happen, I could try to get to the secret room where with the Chair but I really don't want to get nothing out of it. I did go one time in my first try and nothing happen. Maybe there is something in Stage 3 that I didn't find but that is it for ...

You have to die by Poison, you have to die in the begining, and you have to die by Sledgehammer But can you avoid rolly ball or spikes?