ru-vid.com/video/%D0%B2%D0%B8%D0%B4%D0%B5%D0%BE-6iPBNFTNw-Y.html At the Cube Escape: Lake when you open the box "remember the seasons" you can see the code inside of it.
I found out. First you gotta play the second game "Lakes". When you open the vault containing the green gem, you're gonna see the code written in the vault. That's really tricky, I never thought you'd need to play other game to get the achievement.
The lake so you have to fishin the magnet 2 times you have to open the remember the Seasons so you have to see this video When you got a shrimp and then how you Open its the hint and look at right up in the box there is the code.