This add-on does have NPC's, "find an item" tasks and inventory management.
All you have are some bottles of antidote and some entry-level weapon sets you can choose from.
You fill confront some serious undead forces. Each level is a battle with a mini-boss and his minions.

The DLC contains:

• 5 levels (DLC - "Hardcore");
  
• 5 levels (DLC - "Hardcore x2");
  
• possibility to choose an 16-bit version of the game.