Ask HN: What game do you wish existed?

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?

A true planetary scale RTS, which kept the conventions of the RTS genre intact.

Supreme Commander gets close to this, but I want the full surface area of a planet as the campaign.

Does anyone remember “liquid war”, where you battled with another player to control a lump of fluid and engulf the other person?

I really really want to play that, two player, on my phone over network where my finger controls the liquid.

I've had this idea for a puzzler with 5 space dimensions and 2 time dimensions, but I just haven't had the time to implement it.

Also, it sounds cool, but I don't think it'd be fun, just a neat curiosity.

Apollo lunar landing simulator, with optional VR glasses mode.

It would include the rocketry part, spacewalks, airlock operation, moon car, etc.