Looking for a relaxing game

https://store.steampowered.com/app/406150/Refunct/

Slime Rancher is really good, there's also a lot more games that I could recommend, what genre exactly are you looking for? RPG, point and click, etc

In my opinion Abzu is the best option
https://store.steampowered.com/app/384190/ABZU/
or other game cute texture
https://store.steampowered.com/app/331870/AER_Memories_of_Old/

Try Stardew Valley. Really chill and relaxing farming game.

Euro Truck Simulator 2_, or American Truck Simulator would be my first choices.

Others would include Railroad Tycoon 2 or Chips Challenge

Well it all depends on what you call relaxing - game relaxing for one person might be totally annoying for someone else.
With lack of specific info this is first thing that came to my mind: https://store.steampowered.com/app/221180/Eufloria_HD/

Terraria
One Finger Death Punch
Papers Please
Portal

Tales from the Borderlands!

Telltale Games are not realy more then interactive movies wich perfectly fits "laid back".
And on top you get the humour from Borderlands without the annoying gameplay of it ;)

Eufloria HD (https://store.steampowered.com/app/221180) fits the description. It's a little bit of strategy, but it has very simple mechanics and it's easy. It also has a very nice, relaxing soundtrack and the sound effects are easy on the ear.

Not knowing what your tastes are one that I find relaxing is Fract: OSC

MEMOHUNTRESS! a flash game that is doable in a hour or so depending on how fast\slow your eyes work and perceive things!
its on any flash game website just about

its a 3 layered find the object game that is 100000000000000000% better than any other 'hurr durr alice in wonder shit' object finding games nowadays!!!

the 3 layers, background, middle ground, foreground. with some objects constantly moving around, the POV and FOV are constantly changing with each footstep you make the character move around the environment ( middle ground) WOOOOOOOOOOOO!!!

and good gods n gravy. the soundtrack! deliciously beautiful like the peculiar and certainly originally different artwork that is the game itself!

super unfortunately you can only download one song from the game at the creator's site here https://spikevallentine.newgrounds.com
but if you go into internet archives for this newgrounds page, you can go back in time and download the entire game's soundtrack before the creator went religion crazy and deleted all his work since his beautiful and funky things were 'awful' to him and against the lord and whatever @#)(*@#

Minecraft creative mode or even with something like the pixelmon mod on. Or both. Honestly the Minecraft music is relaxing and when enemies aren't a thing the game becomes really chill. Building and seeing what you can make even if it's nothing impressive. Although by now most people have played it out to the point of boredom. Sorry if thats the case. It's the first thing that comes to mind when I think of chill gameplay.

https://store.steampowered.com/app/253650/Sparkle_2_Evo/

Farm Together, My favorite relaxing game!

Machinarium
Eidolon
The Room
Grow Home
Moonlight

You want Quell.

Viridi is a virtual succulent garden, and barely a game.
Plantera is a farming clicker. Not quite an idle game; it's quite active, but not taxing.
Do you like hidden object games? Enigmatis is my favorite in the genre so far.

Many of the early Sim games are like that. SimAnt, SimTower, SimEarth...

Yonder: The Cloud Catcher Chronicles

Depends on the genre you like:
Simulation and God Game: Mountain
Comedy and Narration: The Stanley Parable
Adventure and Atmospheric: The Uncertain: Episode 1 - The Last Quiet Day
Dating sim (not really): Emily is Away
Mindless horde shoter: Payday 2 (play with bots and enjoy bots vs zombie AI)

If you like puzzles, there is Blockwick 2
a few puzzles require some thought and are a bit tricky, but for the most part I can play the game while watching videos. depends if you want to :illuminate:
(not on sale, though, so depends if you want to wait or pay the bucks)

I put 34 hours and I think I'm almost done, but some of that time is me being away and some is because I'm mindlessly solving while focusing on something else completely since most levels are really easy.

Firewatch
INSIDE
Little Inferno
Mini Metro
Oxenfree
Stacking

Not sure what you're looking for but the above games offer a decent amount of game time and can be done at a casual pace.

Sid Meier's Pirates

recettear
faerie solitaire
you have to win the game
mind spheres