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

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.

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.

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.

Gear clickerDormant
Also idle, merge
Buy, merge and place gears to build a factory, working through levels with their own challenges.

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.

Gold and Goblins – Miner GamesUpdated
Also idle, merge
Run a goblin gold mine, merging goblins into stronger miners and boosting them with collectible cards.

Idle Animal EvolutionDormant
Also idle, merge
Breed hybrid creatures in a lab by crossing pairs of animals.

Idle ArmyUpdated
Also merge, idle
Merge soldiers into stronger units and push through waves of drones, ninjas and tanks.

Idle Cat Gunner: Shooter RPGUpdated
Also idle, merge
Cats blast through obstacles with fused guns, and rebirthing at milestone stages speeds up growth.

Idle Farm Tycoon - Merge GameUpdated
Also idle, merge
Run a farm by merging workers, transporters and crops into stronger versions, and level up managers to boost income.
75% idle
Idle HoleDormant
Also idle, physics
Swipe a hole around a curved world to swallow objects and grow bigger, upgrading it with idle earnings.

Idle Horse RacingDormant
Also merge, idle
Combine ponies into faster horses, race them and add stadium items to boost coin earnings.
75% idle
Idle Pocket PlanetUpdated
Also idle, merge
Combine settlements and ships on small planets to build new constructs, colonizing strange galaxies and filling a journal with artifacts.

SwordMasterUpdated
Also merge, idle
Merge swords and gear, evolve pets and summon fairies as a pixel-art avatar fights monsters and raids, leveling up offline too.
75% idle
Mega Tower - Casual TD GameUpdated
Also merge, idle
Merge and modify towers in a sci-fi tower defense that fights on its own but lets you aim manually.
50% idle
Merge and DigUpdated
Also merge, idle
Merge pickaxes into stronger ones and drop them onto blocks to mine resources, with rewards building while you're away.
75% idle
Merge BakeryUpdated
Also merge, idle
Merge recipes to unlock over 40 baked treats, serve customers, and redecorate a bakery that starts as a waffle stand.

Merge Car - Idle Car TycoonUpdated
Also merge, idle
Merge cars into better models and send them around a track, earning money every lap, even offline.
75% idle
Merge Gun: Shoot ZombieDormant
Also merge, idle
Combine identical guns into stronger ones and use them to hold off waves of zombies.