Outer Wilds
If you're a naturally curious person, the odds are you will probably enjoy Outer Wilds. No other game I've played has ever had quite the same blend of mystery, conquering the unknown, and semi-realistic space exploration.
Could someone make another game like it? Not impossible, I suppose, but I think you would be hard pressed.
Should you keep playing the original? You really can't, one time through is all you get. Once you have discovered all the secrets and uncovered the mysteries, that is your journey through it. Still fun to visit every once in a while, though
That is exactly what I ended up doing! It was a blast, definitely would also recommend