5: When you start up the game to play Ashley in the graveyard go left to the edge of the screen and you can find it on the floor there.
1: After talking to Neil about the plan you have to go into the bathroom and get the hexagon next to the sink.
3: While you are on the quest to place the C4, go right instead of left in the beginning. Walk right until you see the hexagon under a banner.
2: After you enter "door 2" with Sal to get the first pyramid you have to go to Sal´s room. It is located under his bed.
4: After entering "door 3" with Sal go to the far bottom left corner. You´ll find it on the floor there.
6: After entering "door 4" with Sal go all the way to the right immidiatly and you´ll find it.