Rimworld is a fun game, heavily mod-able, Albeit modding can be very difficult, with some users missing mod version id ingame, Another issue with modding, if you intend to add in mods to a version without a version/mod manager, [for example, manually adding mods from downloading from online and then putting into the mods section], its a bit difficult to get versions right, if you dont know what you are doing.
I have personally, made alot of stuff!
Using a mod, I have made a character that is a spider being with only their torso, head, and neck, a actual thing! She is very powerful, can not die to most singular enemies, is able to move faster than a regular person by alot, and never needs eat minus to heal.
I have also made a prison which forces its prisoners to work, and create food, and harvest meat from.... Im going to be honest, humans. They use all parts of the humans, even the organs [another mod which lets you harvest organs from dead humans]. Once they harvest organs, and the rest of the person, Im going to have them have the rest of them, like bones and such, sent to my main base, where they will be incinerated.
A fun game, allows you to wage war against a entire planet, or become op and just make money from normal ol farming.
Very flexible and fun game.