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?
You live as tiny mouse-sized humans existing with regular humans who should never know your presence as you occupy the walls and spaces in their home. Every day you must hunt for food, which involves collecting gear to traverse spaces (paperclip + string = grappling hook and rope, matchstick = torch, plastic bag = parachute) to reach places where food is stored (i.e. the kitchen - defended by the cruel cat, mousetraps - easy to find but deadly to use, others). There's also more than one of you with time, where you can find and recruit others from outside the house, mate to create a family base of increasing members (prompting you to expand more into the walls which will increase your chance of discovery by normal humans), and most importantly - coordinate scavenger hunts with your crew (think: one Borrower leads a climb and trails a rope down, allowing others to follow, where more people == more food for the base). Due to the high death rate, there are no main characters, just Borrowers.
[Extras]
- Riding or rearing mice? (they can lead you to the cheese and help dodge the cat)
- Stealing and riding a drone? (perhaps not such a rustic experience anymore)
- Turning your tiny wall cave into a thriving Borrower city complete with electricity and beer? (might require killing the humans)