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