Hacker News Ask HN: What game do you wish existed?

Ask HN: What game do you wish existed?
479 by jharohit | 1269 comments on Hacker News.
I have usually kept a short list of games that would be fun if they existed. Long ago one my bullets in the list was a procedurally generated planet-sized planet with a full diaspora to explore. No Man's Sky fulfilled that for me. What are some games that you wish existed?