Open the game and start a new session, press F5, and create a save file (remember the number in case you already have a save file).

Minimize the game window and press Win + R, then type %appdata% and hit Enter. Once done, click on AppData (located at the top left of the screen).

Open the LocalLow folder.


Then open the Bryce Bucher folder.


Then the Fatum Betula folder.


And finally open your save file with Notepad.

Find this part of the text:


Between the quotation marks at the end, you should type "Secret" (it should look like the image).


Or you can copy the code and paste it into that section:
"liquid3":{"__type":"System.String","value":"Secret"}

Once that's done, save the text file and return to the game. Then press F5 and load the same save file.

Go to the plant room, talk to the monster until you obtain the three test tubes, and one of them should contain the secret liquid.

Finally, pour the liquid into the water and enjoy your achievement!

If this guide was helpful to you, I would greatly appreciate it if you left a comment or, if you’re feeling generous, left an award.