We Were Here

‪This is a 2 player online only co-op game.
One player plays as the explorer and the other is the librarian
You need to do 2 and a half playthroughs to get all the achievements
The game takes about 15-20 mins to finish a playthrough
You have to playthrough once as the explorer then once as the librarian
Then you need to play up to the dungeon for the last achievement
You need to do each puzzle perfect the first time for an achievement
You also need to do a play through without dying
My video is 18 mins long and it will guide both sides through simultaneously
The explorer does most of the work

For this achievement you need to solve puzzle 5 (Chess) as the explorer. See in video at 7:50

Achievement Walkthrough:
Timestamps
Invite: 0:40
Puzzle 1 (Eyes): 1:30
Puzzle 2 (Paintings): 2:50
Puzzle 3 (Valves): 4:00
Puzzle 4 (Dungeon): 5:00
Puzzle 5 (Chess): 7:50
Puzzle 6 (Spikes): 9:25
Puzzle 7 (Theater) 11:15
Ending: 15:35‬

This achievement is for Beating the 5th Puzzle as the Explorer.
First you have to start the generator. You do so by interacting with it and stopping the timer on GREEN 3 times. Then press the switch to the left to start it up.
Once its started, your partner will be able to start the projector in the library. They must take the film reel off the table downstairs and bring it up to the projector. Once its playing, it will show your partner the solution to the Chess Puzzle. They will have to describe it to you.
OR you can just watch my video guide :)