Reverse Collapse is indeed out on Steam! I'm going to be playing it this evening.
Alas, the game is currently being review-bombed by CN clowns still salty about Raymond (the male character who did not actually steal their girl but still lives rent free in their heads because apparently friendship between a guy and a girl is impossible).
But review bombing is temporary. IDW is eternal. Of all the badasses on base, it is IDW the funny meme cat who has survived for 30 years.