1.) Rimworld (I got this a long time before 2018, but, that's when it went 1.0 and came out of beta)
2.) ?
3.) ?
Might fill in #2 and #3 later, I enjoyed Kingdom Come Deliverance quite a bit, but, it kinda ran out of content/felt a bit flat after a few weeks of playing. New X came out, but, I haven't played it yet, so I'm not sure about it. Stuff like Project Hospital came out, but should have been Greenlight/beta.