This latest MacenWolf release by Serpens is one themed around unusual game titles related to Hitler.
There are 5 mapsets, most of which were created by Richard Peck, with one release by another modder called Ian Brown.
They range in levels (As low as 1 map, to as high as 11 in one project), and have fun titles including Hitler Watches Law and Order and Hitler’s Labor Day Picnic.
The MacenWolf release comes with an article speaking in some depth about Richard Peck and his mapping style. You can read it as well as find downloads for each title here.