Path of Exile. Hands down.
I just broke 1400 hours and still going strong. There’s so much to do and so much to learn, and it’s so good at rewarding grinding and keeping you chasing those incremental improvements. It’s 100% replaced RuneScape for me.
I have broken 1000 hours with Cookie Clicker, Guild Wars 2, RuneScape, and Eve Online. I don’t recommend the latter two anymore, but CC and GW2 still hold up.
Honorable mention to Factorio. I’m still in the hundreds but it’s climbing.
"Sometimes the things that may or may not be true are the things a man needs to believe in the most.
That people are basically good; that honor, courage, and virtue mean everything; that power and money, money and power mean nothing; that good always triumphs over evil; and I want you to remember this, that love… true love never dies.
You remember that, boy. You remember that. Doesn’t matter if it’s true or not.
You see, a man should believe in those things, because those are the things worth believing in."
The ball was a colorless wireframe. Color wasn’t necessary for the scenario.
The person was genderless. Gender wasn’t necessary for the scenario. They looked like a wire frame skeleton of a person.
The ball was roughly the size and density of the smallest size bowling ball.
Table surface was circular wireframe with four legs. Material wasn’t filled in as I wasn’t trying to model for friction.
My imagination doesn’t tend to fill in unnecessary details. Too much wasted processing power. I also don’t really envision things. Like, I don’t “see” them in my head. I feel out the shapes and weights and other physical properties relevant to the scenario and let my intuitive understanding of physics roll the scenario forward.
Like, I know the ball rolled until it fell off the table, it fell some distance, then bounced off the floor three or four times with a sharp crack, as I filled in that the floor was concrete as soon as I needed to know how it would bounce, and the sound it would make filled in naturally from there.
I genuinely don’t know whether how I think qualifies as aphantasia. I don’t really imagine visual stimuli, but my imagination is very thorough for sound and feel.
Oh, hey! Another Ratchet: Deadlocked fan in the wild!
No wait…
Psychonauts (the original, not the sequel, though the sequel is also good) is a Summer Camp themed 3D platformer. It doesn’t quite meet your “low stakes/chill gameplay” criteria as it does have combat and mildly challenging boss fights and platforming, but it nails the rest. It’s easier than Tunic. Maybe worth checking out.
Brothers: A Tale of Two Sons strictly meets all the criteria listed, but it’s ultimately a tragic story. If “some kind of impact” includes leaving you in tears, check it out.
Okami is a Zelda style adventure set in feudal Japan with immaculate vibes. You play as the sun goddess Amaterasu in the form of a wolf bringing light and life to a land ravaged by demons. The world is cold and dark at first, but you bring spring and summer on your heels.
Finally, two favorites from my childhood are the Spyro series and the Ty the Tasmanian Tiger series. These are 3D Platformer collectathons and neither of these series are even close to any of the examples you provided, but they are bright and colorful and in my heart they have feelings of Summer Vacation and staying home all day to play video games.
There’s a moose loose in the hoose.