>>5432"Dacii si Romanii" (the dacians and the romans) was the most popular wargame, it actually combines a tabletop format with some pen-and-paper rpg elements, and despite being designed for children it was more popular with teens and adults due to its complex mechanics; even if you don't understand the language, it's enough just to glance the paragraphs on taking prisoners from the instruction manual:).
The late Soviet "Mafia" role-playing game was and still is pretty popular (known as "Werewolf" in the west); it requires the standard 52-deck.
A lot of tabletop dice games were popular, and we even had a socialist-style Monopoly game, called "Bunul Gospodar" (The Good/Wise Administrator), which was supposed to teach some basic economics, as well as leading a balanced lifestyle (I never played this one, but heard good things about it; it's become a bit of a meme and vintage copies cost quite a bit).
There were several other military-themed card games I had, one that I remember had Romanian soldier wear and weaponry from late antiquity till contemporary times, and you were supposed to blindly trade with other players to form period sets before the others did; I cannot remember the name, nor find pictures of it online (i may still have it at my folks' place if they haven't thrown it out at some point).