Games like Archer Forest : Idle Defense
Archer Forest : Idle Defense. These games share the most with it, and each one says why.

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

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

Idle Horse RacingDormant
Also merge, idle, animals
Combine ponies into faster horses, race them and add stadium items to boost coin earnings.
75% idle
Legends of Monster:Idle RPGDormant
Also idle, animals, combat
Start as a baby dinosaur and grow into a giant city-smashing monster, upgrading stats through auto battles that continue while you are logged off.
75% idle
Merge Gun: Shoot ZombieDormant
Also merge, idle, combat
Combine identical guns into stronger ones and use them to hold off waves of zombies.

Bugtopia
Also idle, animals
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
Marisa!ReturnTheBook!
Also idle, combat
A Touhou fan game where you craft Shanghai dolls styled after Gensokyo characters to storm Marisa's house and recover her borrowed books.
90% steam
Slimeward
Also combat, idle
Turn a slime that landed outside your house into resources, building up a village and recruiting heroes strong enough to beat it.
89% steam
Pacifish
Also idle, combat
Fish six areas, fight back against what you disturb, hatch and eat fish for stats, and craft poles, playable idly or actively for speed.
84% steam50% idle
Tiny Biomes: Cozy Idle
Also animals, 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
Alien Invasion: RPG Idle SpaceUpdated
Also combat, idle
Guide an alien that eats humans to grow stronger, evolve its abilities and beat bosses in new locations.

Ant Art TycoonUpdated
Also idle, animals
Put a colony of ants to work painting canvases, then set prices by watching how buyers react to each piece.

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.

Battle Simulator: Idle WarfareUpdated
Also idle, combat
Recruit fighters from many eras, from Spartans to helicopters, and watch them clash in automatic battles.

Bee Factory!Updated
Also animals, idle
Unlock over 100 bees, sell honey and upgrade machines. Tapping speeds up the bees and earnings keep coming while you're offline.
50% idle
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.

Clicker Heroes - Idle SlayerUpdated
Also idle, combat
Tap to fight waves of monsters and recruit a team of heroes with their own abilities, in the mobile version of a long-running idle RPG.

Combo Clash - Era WarsUpdated
Also merge, combat
Merge weapon blocks on a grid to power a hero against waves of enemies, advancing through eras from cavemen to future soldiers.

Cow Evolution: Merge to EvolveUpdated
Also merge, animals
Combine cows into strange mutant species, dress them up and tap to gather resources for your farm.

Demigod Idle: Rise of a legendDormant
Also idle, combat
Play a demigod stripped of angelic and demonic power, regaining it through fast idle growth and flashy 2.5D battles.

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.