I've supported mostly Tower Defense games on Greenlight since it is one of my favourite genres, but they are probably not that interesting to share to you guys. Besides those I supported Slender: Source since I enjoyed Slender a lot, and would love to see it on Steam. And also Black Mesa since my friend begged me to (I'm not that much into Half Life, don't hate ^^').
I want to share this game though,
Interstellar Marines. It has been under development for a long time, and needs our support to be finished. I hope
this video will convince you! (;