forum.freeciv.org

I want to make my own ruleset, but to be honest I don't know much about freeciv code, at least I need to know how to add units and their custom icons, buildings, etc.
Those who have dealt with modding freeciv, please give advice on where to start and what to do, I would be grateful for help!
P.S I also need advice on how to localize ruleset

https://www.freeciv.org/wiki/Editing_rulesets
https://www.freeciv.org/wiki/Editing_tilesets

See also documents in the doc/ -directory of the freeciv distribution.

I also like making my own rulesets. The wiki links are essential references, also the various README.* files in the doc directory. The supplied rulesets have good reference info in the comments in the *.ruleset files. It's also good to find out what other folks have done, I've collected and studied rulesets from Longturn (they have LT Traditional ruleset and Simulation ruleset) and from Freeciv-web (mp2-caravel ruleset) - I think you can find them on the wiki. Check out my own rulesets (3.0) at -
viewtopic.php?t=91837&start=20
I'm currently working on 3.1 versions.

Thank you guys, now I know where I can get the information about ruleset making