Victoria 3 - my favourite historical materialism simulator.
Stellaris - my favourite fully automated luxury space communism simulator.
Dwarf Fortress - my favourite city planning and management simulator.
Slay the Princess - my favourite regicide simulator.
Xenonauts - my favourite simulator of communists (and other countries too) fighting a feudal alien empire.
Honorable mention of Disco Elysium (my favourite book masquerading as a video game).