I have so many prototypes that I've debated self-publishing on Gamecrafter or as a print-and-play file versus pitching. I think a big factor for me keeping many of these in the prototype stage for now is wanting better production, art, and graphic design, which publishers are great for helping with.

It reworks several systems to feel more like Civ. The base game had unusual combat where you use control points to attack adjacent control points. The expansion replaces that with more straightforward army units. It also adds exploration, governments, districts, and forts to capture as an objective.

The Terra Incognita expansion to Civilization: A New Dawn

Mechs vs Minions is another board game with an online custom scenario generator (na.leagueoflegends.com/en/featured/...). Studio Midhall taking that one step further by running contests for scenario design was a great idea.