nao sei

Hi, I'm sorry for not replying earlier. Unit properties are primarily governed by unitrules.xml and craftrules.xml. However, the only way to make completely new abilities is with a custom script created with RoN's inbuilt script editor, and even then there is only so much you can do with them.

Unfortunately I think entrenchment is just limited to infantry. You could still try playing around with siege weapon properties, perhaps by making the catapult upgrade from an infantry unit or something like that, but I'm not sure how far you'd get with that.

It is possible to make destroyers spawn sea mines, but you'll have to replace the forced march ability in craftrules.xml with your new ability, as well as actually adding the sea mine unit in unitrules (I guess it would function as a fireship). The actual spawning ability will need to be created with a script. I've been able to do something similar with my mod, however I haven't been able to make the ability work consistently yet.

This is extremely helpful, I've modded RPGs before and RTS seemed like a good place to expand my experience. Welp.... time to start messing with the script editor.. wish me luck.

Good luck! I think the best way to learn scripting is just to mess around with the editor. This might also help a bit when it comes to working out some of the script functions: http://ron.heavengames.com/downloads/showfile.php?fileid=38&ci=d6e34b71977d2b4c23adae4e46f9965fYToxOntpOjA7YToyOntpOjA7czoxNDoiU2VhcmNoIFJlc3VsdHMiO2k6MTtzOjU5OiJsaXN0ZXIucGhwP3N0YXJ0PTAmYW1wO3NlYXJjaD1zY2VuYXJpbyBlZGl0b3IgZG9jdW1lbnRhdGlvbiI7fX0=

I also recommend that you look at some mods and scenarios that include scripts. You can find a lot of scenarios here: http://ron.heavengames.com/downloads/lister.php?category=single