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 4 (Dungeon) as the explorer. See in video at 5:00

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 4th Puzzle as the Explorer.
Your partner will have a map in the Library. They will give you directions on how to get through the Dungeon. After you exit the Dungeon Maze, You will pop the Achievement and complete the puzzle! Check out my Video guide to get through the Dungeon Easy.
**And don't forget the Easter egg/Happy Ending achievement is in this puzzle
Here is the Explorer Walkthrough: