Read.

Info.
The promo code is ONE word. Not a mix of words like onthebeach
It is 6-16 letters long.


Clues.
1. Lost expedition-> glowing barrel clue= letter
2. Dark forest-> a hidden path's skull clue
3. Fathom crypt-> sarcophagus, a mysterious chest
4. Lost expedition-> hidden ice cave, a monogrammed chest
5. Sand cave-> a mysterious crystal
6. Sewers-> farrow the forger
7. Swamps -> 4 eyed jack
8. Humania-> henrique
9. Mount fang-> antenna inthe ground near a cemetary stone
10. Nuri's tent-> Esmeralda
11. Forest Haven-> "Nightmares happen to all of us at one time or another"

We still needa check Alien Oasis Shadow caves, and Balefort Castle for clues.
I will start guessing with the current updated evidence.