Kriegsland, also entitled Kriegsland : Blutorden, an awesome The New Order mod for Doom created by GAA1992 and YukesVonFaust had its first version released in June 2017 and grew up on popularity and quality since then.
The mod, which brings and combines elements from other Wolfenstein games as well, features totally new monsters, weapons, pick-up sprites, HUD, and screens, as well as fresh gameplay modifications, gore and plenty of difficulty.
The above video shows the Kriegsland's first version being showcased by me. Despite lacking some of the newest updates, like the gore system, it still gives a general idea of what the mod offers and what it is all about. P.S: Turn on the English subtitles because the videos got 'em!
The next video shows the 09/23/2017 version, already outdated, but the first one that implemented the gore, blood and gibbing system.
This Kriegsland's version also brought some general "under the hood" updates, like bug fixing, balancing and subtle graphic editions, but also features better animations, sound enhancements and new enemies, including the requested Nazis with shotguns:
Since then, the mod has been updated even further (the newest one being Kriegsland 2.4), improving its compatibility, coding, balancing and aesthetics. It should work with any Doom registered IWAD or a Freedoom's one, GZDoom 2.4 and above or Zandronum 3.0.
It can also be played single player, cooperative or deathmatch, despite some issues may occur in the last option, but no big deal. I'd also say that GAA1992 and Yukes Von Faust are doing a fine job on this PWAD, being it one of my top Doom mods so far. It's going the right way.