Reich star (1991)
"In an alternate universe, history took a terrifying turn for the worse during World War II, with the Axis Powers conquering the globe. Nearly 200 years later the '"Third Reich" and the "Empire of Nippon" have spread their reach to off-world colonies far beyond our Solar System, enslaving the technologically inferior alien species they have so far encountered, and maneuvering their might against each other in an ever threatening Cold War. In the midst of this darkness many resistance groups have emerged to fight against the Nazi tyranny. The player characters belong to one of these groups, and fight to overthrow the Third Reich and restore freedom and democracy to Erde and her colonies."
Text taken from Wikipedia