tl;dr: what do I need to know to build off someone else’s mod that adds additional playable civs?
There’s a mod in the mod center that lets you play as several of the single-player only civs in skirmish and multiplayer. This has always seemed like a no-brainer to me, just off the intuition that “they’re already in the game.”
However, even the best version of this idea on the mod center feels incomplete. In total, the single player factions is includes are:
British East India Company, Canada, Falcon Company (from TWC Act II: Shadow, Euro version), Moroccans, Native Americans, Pirates, and The Circle.
Sadly missing from that list is the Knights of St. John (Malta) fan- and personal-favorite, as well Black’s Mercenaries, a native variant of Falcon Company, campaign versions of the TAD civs, plus maybe a few extra “reskins” from Historical Scenarios (Tatars, Barbary States, Somalis).
Additionally, a few of those included are missing features (e.g. Moroccans can’t advance to Imp) and they generally feel unpolished. Not to mention most are a spin-off of the British, though to varying degrees.
All this gives an intriguing mod that is fun to play around with but ultimately feels underwhelming and makes me want more. This is doubly frustrating because unlike the “real” game where I can only make suggestions and hope for the best, mods are something I and the rest of the playerbase can directly control. But the trouble is, I have no experience modding and have no idea where to start.
What do I need to know to modify the game or build off someone else’s mod? Where can I go to learn more? What’s the best way to make a mod that adds in new campaign civs?