Some governments requires very specific civics to obtain, so here are the harder ones to get.

Nazi Reich
-Fascism
-Ultranationalist
-Perpetual Expansion
-Fanatic Xenophobe
-Dictatorial authority

Crusader Kingdom
-Fanatic Spiritualist and Militarist
-Monarchism
-Feudalism
-Defender of Faith
-Warrior Culture
-Imperial authority

Pretender Hive
-Collectivist
-Drone Brotherhood
-Utilitarian Planning
-Dictatorial authority