Games like Zen Shards - Idle Merge Game
Zen Shards - Idle Merge Game. These games share the most with it, and each one says why.

Tiny TerracesUpdated
Also idle, cozy
Tiny workers water, weed and harvest a terrace garden on their own while you do other things. Use crops and parts to build more helpers and decorate the plot.
92% steam90% idle
Cast n Chill
Also cozy, idle
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
Bugtopia
Also idle, cozy
Raise and breed over 300 real-world insect species in terrariums you landscape yourself, with breeding boxes that can produce rare new bugs.
92% steam
Chill Corner
Also cozy, idle
A lo-fi ambient idler where you decorate a cozy room, dress up a character and pets, and keep a task list while music plays.
90% steam
Mountain
Also abstract, cozy
You are a mountain. Time passes, weather and life come and go on your slopes, and you mostly watch.
88% steam
Lakeside BarDormant
Also cozy, idle
Run a lakeside jazz bar full screen or docked at the bottom of your screen, where hired staff keep it going and spirit-tended crops feed new recipes.
86% steam90% idle
Spellbound & Shelved
Also cozy, idle
Hire gnomes to reshelve thousands of spilled spellbooks in a wizard library. Flip the sign to trade customer income against the mess they make, until the last book is put away.
87% steamhas ending75% idle
Tiny Biomes: Cozy Idle
Also cozy, idle
Tiny animals produce resources while you chop wood in a gathering area. Spend gold on a skill tree to boost your small biomes, with no timers or pressure.
84% steam
Adorable GardenUpdated
Also idle, cozy
Run a plant nursery with a partner and gardeners, a low-effort idle game with customizable avatars.
90% idle
Archer Forest : Idle DefenseUpdated
Also idle, merge
Defend a forest with animal archers by merging arrows into stronger ones, clearing stages, and beating bosses for loot.

Balls ControlDormant
Also idle, abstract
Draw colored balls toward you and spend the proceeds on upgrades in a relaxed idle game.

Battle Royale Tycoon Idle GameDormant
Also merge, idle
Slide and merge weapon tiles on a grid to build a battle royale arsenal of hundreds of weapons.

Blacksmith - Merge Idle RPGDormant
Also merge, idle
Merge weapons into over 81 new designs, use runes to multiply gold and duplicate items, and reset for Soul Gems when progress slows.

Blade IdleUpdated
Also idle, merge
Turn a herb collector into a sword hero, clearing stages and dungeons and merging gear to power up.

Candy Critters: Idle MergeUpdated
Also merge, idle
Buy and merge cute critters that chew through candy blocks to uncover coins and treasure across a sugary world.
75% idle
Cat Hero : Idle RPGUpdated
Also idle, merge
A cat defends its sleeping owner's dreams, tapping to merge fish into stronger fish-missile ammo.

Cats&Soup: Relaxing Cozy GamesUpdated
Also cozy, idle
Cats in a forest cook soup and gather resources while you're idle; dress them up and unlock new recipes.
75% idle
Dessert Factory IdleUpdated
Also idle, merge
Bake treats in a dessert factory and combine matching machines to upgrade them into ones that make fancier sweets.

Food Fever: Idle RestaurantUpdated
Also idle, cozy
Staff cook and serve customers in cute restaurants while you relax, with the business running offline.
75% idle
Frogs KitchenUpdated
Also idle, cozy
Run frog-staffed kitchens across themed locations on a whimsical planet, hiring chefs and expanding while you are away.
75% idle
Gear clickerDormant
Also idle, merge
Buy, merge and place gears to build a factory, working through levels with their own challenges.

Geometry Tower: Idle DefenseUpdated
Also idle, abstract
Defend a single tower against endless waves, picking roguelike upgrades each run and researching permanent boosts.

Goblin Miner: Tycoon GameUpdated
Also idle, merge
Merge goblins into faster workers who chop wood and mine gold, unlocking labs, runes, and new territory as your empire grows while you are away.
75% idle
Goblins Wood: lumber tycoonUpdated
Also idle, merge
Merge goblin workers to chop wood and mine in an enchanted forest while the crew keeps working offline.