A worthwhile bit of DLC that serves as a fun (but narratively unessential) prologue to 2014's The New Order. It can stand on its own no problems, too - if you're looking to play a CliffsNotes version of Wolfenstein, this is absolutely the way to go.
70% of the game feels exactly like TNO, but the last act is full of unexpected twists and turns that make me wish the entire game had focused on the supernatural - it had a distinctly Indiana Jones vibe. A much-improved mech section was also a welcome diversion.
Completion: I beat the main story and got a fair number of the collectibles. I tried out one of the time trials too.