Obtains on interacting with note behind at the start of the first level

Obtains on interacting with note located on the wall of a metal container with a roof located under the pipe near the empty reels in level 1

Obtains on interacting with note located on pallets in warehouse with green door at the corner of the map

Obtains on interacting with note located on metal beams in warehouse with green door at the corner of the map

Obtains on interacting with note located on metal door in level 2, there is 3 boxes near the door

Obtains on interacting with note located on the wall against the exit from building in which player starts level 2

Obtains on interacting with silver key in level 1

Obtains on interacting with green door in level 1

Obtains on finishing level 2

Obtains on interacting with medical kit

Obtains on opening red door in level 1