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

Revolution Idle
Also prestige, abstract
Wheels inside wheels. A clean, abstract prestige stack with a lot of layers and very little fluff.
87% steam60% idle
Mini Idle Dice Monster
Also idle, prestige
Roll dice with a friendly monster named Fred, chaining combos and buying perks, with a prestige system for long-term growth.
79% steam
Incremental Cubes
Also prestige, abstract
Collect falling cubes, beat enemies and bosses to grow to bigger cubes, and prestige into a skill tree with helpers and challenges.
69% steam
Almost a Hero - Idle AdventureUpdated
Also idle, prestige
Lead a team of hopeless heroes through dungeons, prestiging for permanent artifacts while they fight while away.
75% idle
Apocalypse ClickerUpdated
Also idle, prestige
Build a cult tower, create monsters and summon demon gods to end the world, then prestige and do it again.

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

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

Crush Them All - Idle RPGUpdated
Also idle, prestige
Collect heroes and crush bosses across more than 1000 stages, ascending to new worlds and progressing while away.
75% idle
Doomsday IncrementalUpdated
Also idle, prestige
Tap to build and expand an underground bunker for survivors, then destroy the world again for bigger profits.
25% idle
Evil Factory: Idle ClickerUpdated
Also idle, prestige
Manage a factory in hell, hiring demons to collect souls, automating torture equipment, and unlocking new circles by assembling puzzle pieces.

Evil Hunter TycoonUpdated
Also idle, prestige
Rebuild a ruined town with facilities for hunters, train them against monsters, and reincarnate them to grow stronger.

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

Idle Bubbles Cannon: Tap BallsUpdated
Also idle, abstract
Upgrade and add cannons that burst colored bubbles and shapes, either relaxing while they work or triggering boosts for faster cash.
50% idle
Idle Cat Gunner: Shooter RPGUpdated
Also idle, prestige
Cats blast through obstacles with fused guns, and rebirthing at milestone stages speeds up growth.

Idle Cooking Tycoon - Tap ChefDormant
Also idle, prestige
Grow a bakery empire by hiring chefs, funding recipe research, and prestiging back in time to restart stronger.

Idle Factory Tycoon: Business!Updated
Also idle, prestige
Build workstations across factories, hire managers to automate sales and prestige factories for more output.
75% idle
Idle Frontier: Western TapperUpdated
Also idle, prestige
Settle a string of Wild West towns by tapping for gold, hiring quirky townsfolk to automate the work, and prestiging onward to the next frontier town.
50% idle
Idle Island - City TycoonDormant
Also idle, prestige
Build a city on a private island, adding homes, shops and factories, with offline cash and a prestige reset.
75% idle
Idle Slayer: Addictive ClickerUpdated
Also idle, prestige
Slay monsters and bosses across many worlds for coins, with a big skill tree, ascensions and offline progress.

Idle Space Farmer ManagerDormant
Also idle, prestige
Run an anime-styled space farm, recruiting agents from gacha pulls to fight monsters and upgrading ships across planets with prestige.
75% idle
Knight Hero Adventure idle RPGUpdated
Also idle, prestige
A knight auto-runs through monsters while you pick gear, forge rolls and potions between runs, then prestige for lasting bonuses when progress stalls.

Make More!Updated
Also idle, prestige
Run wacky factories, replace workers with robots, collect 220 workers, and restart with better bonuses in a comic work simulator.

Planet Evolution: Idle ClickerUpdated
Also idle, prestige
Tap a planet to gather coins, attract objects to decorate it and use prestige to push across the universe.
50% idle
Pocket Politics: Idle MoneyDormant
Also idle, prestige
Automate political lobbies, gather endorsements and prestige for followers on a satirical path to world president.
75% idle