One of the contributing writers to the ALIEN RPG, Paul Elliott (aka Zozer Games) published an alternate setting for the Traveller/Cepheus Engine rule set called Kosmos 68, wondering what the future might be like if the Soviet Union won the 1960's space race and kept going.
Andrew Boswell has taken the Kosmos68 setting and began writing a fantastic set of posts about and within it:
https://kosmos68com.wordpress.com/
These resources are an excellent way for a GM to get their heads into the UPP mindset, especially for younger GMs that may not have grown up during the Cold War era.