At several different points during Wolfenstein: The Old Blood, you encounter spots where B.J. Blazkowicz can fall asleep, prompting dream sequences that stick the modern, polygon-constructed B.J. into various levels of Wolfenstein 3D, complete with low-resolution graphics and flat sprites. Functionally, it plays almost identically to the original, but vestigial bits from the modern day, like vertical aiming, stand out, especially if you clearly remember experiencing Wolfenstein 3D for the first time. Also, the game's use of sprites gives it a similar feel to a shooting gallery where you get to walk around and explore. It's a stark reminder of how far the series--and games in general--have come. The same can be said of The Old Blood as a whole, and although it stumbles attempting to reconcile old and new thematically, its varied encounters deliver the primitive thrill of clearing a room in a hail of bullets and blood.