For a thread of the conversation on the same topic I had in Mastodon you could follow this link, surely you will find the activity and the links very useful.

I'm planning to do it genuinely hard sci-fi, so it will have to deal with rather complicated things like those 5.4 Sv of surface radiation (see Colonization of Europa - Environment).

As for the player characters I'm planning to have a crew of scientists and, probably, some military types.

Yes, the sub will need to be very strong and prepared to deal with depths of 100 km Europa - Subsurface ocean.

Interesting, there could be traits or backgrounds related to a given origin or birth place for example (something that D&D 5 and other games already do).

A poor game session could be the result of many things (not necessarily related to the game), like the mood of the referee or the players at the moment of playing or if the referee have had enough time to do a proper preparation.

Oh, yes. Very dangerous times for player characters.

Welcome aboard and into the rabbit hole 😉

These are some things I'm working on (in varied degrees of completion):

• A Cthulhu Mythos campaign plunging the players into the Taiping Rebellion
• Studying how to make a version of Eclipse Phase using M-Space (based on the Mythras roleplaying game)
• Toying with some ideas using Mongoose Traveller 2nd edition and 2300AD
• Toying with some OSR concepts using Axis Mundi by 77 Mundos

Of course, unions as we know them are a product of 19th century, and the guilds became less important.

But in some of unions' characteristics evolved from the guilds, as can be read in Organized labor | Definition, Movement, History, Examples, Unions, & Facts | Britannica Money.

It should be noted that if you want to organize the workers into a strike they need some organization and in medieval era a guild can be a way to do it, or could be other means of self-orgnization, see the links below:

Deir el-Medina strikes

Secessio plebis

Peasants Revolt

It shouldn't be very difficult, these links could give you some ideas:

The trade unions of the Middle Ages - People's History Museum: The national museum of democracy

Labor Organizations in Ancient and Medieval Times – Brewminate: A Bold Blend of News and Ideas

Guild | Trade Associations & Their Role in Medieval Europe | Britannica Money

It could depend on which game systems are more famous in your country. Games like Call of Cthulhu and Runequest , both using BRP (a percentile system) were very famous and played in Spain for many years in direct competition of Dungeons & Dragons.

Hello, here you have my blog, it's written in three languages (Spanish, Catalan and English) and I hope you find it useful.

There's all kind of themes available, all related to culture, history, science and, of course, tabletop roleplaying games.

El Dado Inquieto