Games like Swarm Simulator
Swarm Simulator mostly idle, never really ends, stacks 1 prestige layer. These games share the most with it, and each one says why.

Mushies!FeaturedComing soon
Also prestige
Click the big mushroom, hire worker shrooms, build houses and dig underground in a cozy pixel-art mushroom village. Over 85 upgrades and a Wisdom prestige loop.

Cookie Clicker
Also prestige, classic · Same active/idle balance (leans idle)
The grandma of the genre, literally. Click a cookie, buy grandmas, ascend, and discover the game is much stranger than it looks.
96% steam70% idle
AdVenture Capitalist
Also prestige, classic · Same active/idle balance (mostly idle)
Lemonade stand to oil empire, hire managers so you never click again, cash in angel investors.
88% steam80% idle
Idling to Rule the Gods
Also prestige, classic · Same active/idle balance (leans idle)
Train clones, fight gods, rebirth. An old-school Unity idler that still has a loyal crowd.
85% steam75% idle
Clicker Heroes
Also prestige, classic
Click monsters, hire heroes, ascend, transcend. The game that made idle RPGs mainstream on Steam.
90% steam60% idle
Exponential Idle
Also pure numbers, prestige · Same active/idle balance (leans idle)
A math idler where the upgrades are literally terms in an equation. Graduate, then play the custom theories.
75% idle
Revolution Idle
Also pure numbers, prestige
Wheels inside wheels. A clean, abstract prestige stack with a lot of layers and very little fluff.
87% steam60% idle
Incremental Mass RewrittenDormant
Also pure numbers, prestige
Gain mass, become a black hole, then an atom, then a supernova. The numbers get absurd quickly and never stop.
4.4★ galaxy60% idle
Incremental Adventures
Also prestige, pure numbers · Same active/idle balance (leans idle)
Heroes fight on their own in automated turn-based combat while you tune the automation and push toward double-exponent numbers through stacked prestiges.
78% steam70% idle
Underworld Idle
Also pure numbers, prestige · Same active/idle balance (leans idle)
Run an underworld where higher units spawn lower ones, across four factions each producing its own resource, with a prestige system.
71% steam70% idle
SynergismUpdated
Also pure numbers, prestige
Five prestige layers stacked like a tower, each one reshaping the ones below. For people who liked AD and want more.
75% steam60% idle
Fundamental
Also prestige, pure numbers
Start with a single particle and build up the universe. Galaxy's most-played game by total hours, by a lot.
4.4★ galaxy65% idle
Antimatter DimensionsUpdated
Also pure numbers, prestige
Buy dimensions that buy dimensions, then break infinity, then break reality. The reference point every numbers-go-up game is measured against, and it has a real ending.
92% steam4.6★ galaxy200–600h ending55% idle
DodecaDragons
Also prestige, pure numbers
Twelve dragons, twelve colours of magic, and one of Galaxy's most-favourited games. Big numbers, handsome UI.
4.6★ galaxyhas ending55% idle
Cell to Singularity
Also prestige · Same active/idle balance (leans idle)
Evolve life from a single cell to a technological singularity, with a surprising amount of real science in the tooltips.
89% steam70% idle
NGU Idle
Also prestige
Joke-dense RPG idler with dozens of interlocking systems. Beating a boss is the easy part; allocating energy is the game.
96% steam65% idle
Distance Incremental
Also pure numbers, prestige
Go faster, go further. Rockets, time reversal and a very long list of layers from the Prestige Tree author.
4.4★ galaxy55% idle
Idle Skilling
Also prestige · Same active/idle balance (leans idle)
Dozens of skills that feed each other, with very fast prestige loops early on.
70% steam75% idle
Bloobs Adventure Idle
Also prestige · Same active/idle balance (leans idle)
A RuneScape-style idle RPG with 24 linked skills, automated boss fights, soul collecting and skill prestige, plus banked offline time to spend later.
88% steam75% idle
Idle SpiralUpdated
Also prestige, pure numbers
Grow a mathematical spiral ever outward by buying formula upgrades, stacking several prestige resets, and use the spiral as a weapon in battles.
79% steam
The Prestige TreeComplete
Also pure numbers, prestige
A skill tree where every node is a prestige layer. It spawned the Modding Tree and a thousand descendants.
4.6★ galaxy30–80h ending50% idle
Realm Grinder
Also prestige
Pick a faction, build a kingdom, abdicate, reincarnate, ascend. Every run changes which of eleven factions is optimal.
87% steam55% idle
Egg, Inc.
Also prestige · Same active/idle balance (leans idle)
Build a chicken empire, launch eggs into space, co-op contracts with strangers. The mobile idler that sticks.
70% idle
Space CompanyDormant
Also classic · Same active/idle balance (leans idle)
Mine, power, research, and expand into the stars. A classic resource-chain idler from the golden age.
70% idle