Here is the full list of all 11 Atlas Negro: Infernum Demo achievements.
Groovy!!
Interact with the statue guarding the security room
It’s always a good time to drink
Unlock the entrance to the crypt
Enter the wrong code three times to open the security room
Activate all monitors in the security room
Collect all audio tracks
Finish the demo
Yer fond of me lobster!
Collect all the tarot cards
Gather all the offerings