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