I've recently released a sort of successor to the Unofficial Codex Continuation mod created by SquadBroken back around 2018, with the original forum post for it found here: viewtopic.php?f=12&t=3862&p=68165&hilit=codex+edition#p68165
If you liked the original mod and/or mods similar to it, do give it a try; there is more information on the mod page and the situation around it here: https://www.moddb.com/mods/unofficial-codex-edition
I've also created a Discord server dedicated to the mod, so that people may find others to play with and communicate with me as I develop it further: https://discord.gg/uSJEhGGdqC
Feel free to ask if you have any questions
