This is for opening the safe in Dave's Apartment
Find the safe by clicking on the workbench in the kitchen
The safe will reveal itself in Dave's room
You need to collect the photos in first episode to get the combo
You need to wait until 8:40 to collect the one in the drawer in your room
You need to wait until 9:10 to collect the one in the vents.
Going through the vents passes the time 10 mins
You can check the time with the alarm clock in your room
In the study is a frame where you put the pictures in
Put the bigger piece in and look at the frame to get the Mysterious photo achievement
Then put in the other piece to get the other photo achievement and the combo for the safe
Achievement Walkthrough: