Rimworld is one of the best games i have ever played. It takes some time to get good at it, but its such a great experience. Building your own colony makes every game very different from the others. Its still being update by game developers by adding new dlcs and also new content to Vanilla game. Its has a ton of mods you can try to change your gameplay. It also owns an Multiplayer mod, which is not so stable, but still gives an amazing feeling to make your own colony and commit war crimes together with your friends. :)