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