Games like Mountain
Mountain. These games share the most with it, and each one says why.

Placid Plastic Duck Simulator
Also cozy, slow
Float in a pool as a rubber duck while more ducks drop in one by one, with a day and night cycle and calm music.
98% steam
Viridi
Also cozy, slow
Care for a small pot of succulents that grow in real time. Water them, name them, and keep the window open beside your work.
92% steam90% idle
Rock Simulator 2
Also cozy, slow
Be a rock and watch the world change around you, unlocking over 100 rocks at a deliberately slow pace, alone or with friends.
93% steam70% idle
Tree Bonsai
Also cozy, slow
Shape a plum bonsai by pruning, feeding, and grafting as it grows on its own through the seasons, blossoming, fruiting, and eventually aging and dying.
81% steam
Zen Shards - Idle Merge GameUpdated
Also cozy, abstract
Merge sparks that bounce around and shatter colorful shards in a calm, procedurally drawn idle game with ASMR sound.

Rusty's Retirement
Also cozy
A tiny robot farm that lives at the edge of your screen while you do other things. Idle in the purest sense.
97% steam15–30h ending95% idle
Tower WizardComplete
Also cozy
Climb your tower toward the sky with magic and spirits. A short, calm, finishable idler.
97% steam3–5h ending40% idle
Digseum
Also cozy
Dig up relics across a dozen sites and display them in your museum to fund better tools. A compact run of a few hours.
98% steam
Shelldiver
Also cozy
An elderly turtle pilots a submarine to catch jellyfish and salvage ocean junk, selling the haul to upgrade gear and dive into deeper biomes.
98% steam
Garden Galaxy
Also cozy
Spend coins on random item drops and arrange them into your own garden, filling themed sets as visitors bring money in the background.
98% steam70% idle
Ropuka's Idle Island
Also cozy
A frog mows grass in a small window on your desktop; spend the clippings on better tools and island decorations.
97% steam90% idle
Birdwatching Notebook
Also cozy
A small postcard scene on your desktop draws in dozens of bird species as you decorate the spot, unlock new habitats and photograph visitors.
97% steam90% idle
Cast n Chill
Also cozy
A relaxed pixel fishing game with a dog companion where you sell catches for better gear across 16 spots, and can switch to a passive mode that fishes for you.
95% steam50% idle
Leaf it Alone
Also cozy
Clear a yard buried in leaves with a rake, a blower or bare hands, upgrading tools until the slow chore turns fast and the garden comes back to life.
95% steam
The Adventure of NAYU
Also cozy
Click to help a fox and her party fight through a gentle, short story, spending star shards on training and costumes, with an endless mode afterward.
95% steamhas ending75% idle
Luna's Fishing Garden
Also cozy
Catch fish, trade them to a fox spirit, and spend the proceeds turning an archipelago into a garden. A short pixel-art story you can keep playing after.
95% steamhas ending
Mushroom NookDormant
Also cozy
Mushrooms sprout on your desktop to collect, water and grow through several phases. Decorate a little garden that sits beside your work.
98% steam90% idle
Plantera 2: Golden Acorn
Also cozy
Grow a garden around a magic oak with round helpers who harvest for you, even while the game is closed, and reach for golden acorns.
95% steam50% idle
Chef Knight
Also cozy
Fight through dungeons for monster ingredients, cook them into dishes to sell to adventurers, and upgrade combat and cooking between runs.
95% steam
LurkBait Twitch Fishing
Also cozy
A Twitch overlay where viewers cast lines through chat, points or subs, and the fishing plays out on its own while you stream.
98% steam90% idle
Chillquarium
Also cozy
Buy fish, raise them in real time, and sell them or keep them for ticket income while chasing 156 species and rare color variants.
93% steam70% idle
PomoFarm
Also cozy
A focus timer where a duck's farm grows while you work, with 60 crops across four seasons and skills to unlock.
97% steam90% idle
THE LONGING
Also slow
Wait 400 real days in an underground palace for a king to wake. The clock runs while the game is closed, so you can explore or simply leave.
92% steamhas ending70% idle
Farm Together 2
Also cozy
Build a farm from one plot to a huge estate, alone or with friends, where crops keep growing while you are away.
93% steam