I'm new to mod/map making so bare with me.
This is a single map I made in like 40 minutes, it is my own "recreation" of Bohemia Interactive Studio's Altis and Stratis maps from ArmA 3, it not a scenario but just a blank map, although none of the wonders and most of the resources found on the map are not in the game, I included them anyway just so the map was at least playable under normal circumstances, the map is best fit for a maximum of four civs (which makes sense since there are four factions that are included in the Altian/Stratis campaigns, the are no designated spawn points but I made sure key areas like Athira, Kavala and Agia Marina are surrounded by luxury and strategic resources hoping to attract the AI to them for city placement, I will make a scenario out of this map eventually but I want to wait a bit to see if someone would actually make civs, such as an Altian or CSAT civ, that would be pretty dank.
I made this map using the real life islands of Lemnos and Agios Efstratios as well as Altis and Stratis in game, however this is not meant to be an accurate depiction of the Altian and Stratis landscape so don't get triggered by my misplacement of hills, thanks.
In the future I may also do Tanoa and Sahrani simply because of how easy they are compared to Altis.
Side note: Let me know if it is working for you, all I did was put it in my maps folder from Civ 5 in SteamApps and it was there, it should work just fine for everyone.