Games like Incremental Mass Rewritten
Incremental Mass Rewritten leans idle, never really ends, stacks 8 prestige layers. These games share the most with it, and each one says why.

Fundamental
Also physics, prestige, pure numbers · Same active/idle balance (leans idle)
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
Distance Incremental
Also pure numbers, prestige, physics · Same active/idle balance (balanced)
Go faster, go further. Rockets, time reversal and a very long list of layers from the Prestige Tree author.
4.4★ galaxy55% idle
SynergismUpdated
Also pure numbers, prestige · Same active/idle balance (leans idle) · 5 prestige layers
Five prestige layers stacked like a tower, each one reshaping the ones below. For people who liked AD and want more.
76% steam60% idle
Revolution Idle
Also pure numbers, prestige · Same active/idle balance (leans idle)
Wheels inside wheels. A clean, abstract prestige stack with a lot of layers and very little fluff.
87% steam60% idle
Antimatter DimensionsUpdated
Also pure numbers, prestige · Same active/idle balance (balanced) · 4 prestige layers
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
Incremental Adventures
Also prestige, pure numbers · Same active/idle balance (leans idle) · 3 prestige layers
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
The Prestige TreeComplete
Also pure numbers, prestige · Same active/idle balance (balanced) · 20 prestige layers
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
Exponential Idle
Also pure numbers, prestige · 2 prestige layers
A math idler where the upgrades are literally terms in an equation. Graduate, then play the custom theories.
75% idle
Clicker Heroes
Also prestige · Same active/idle balance (leans idle) · 2 prestige layers
Click monsters, hire heroes, ascend, transcend. The game that made idle RPGs mainstream on Steam.
90% steam60% idle
DodecaDragons
Also prestige, pure numbers · Same active/idle balance (balanced)
Twelve dragons, twelve colours of magic, and one of Galaxy's most-favourited games. Big numbers, handsome UI.
4.5★ galaxyhas ending55% 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% idleIncremental Mass: Classic ReloadedDormant
Also pure numbers, physics, prestige
A reloaded version of the classic Incremental Mass, where you grow your mass through layered resets.

Realm Grinder
Also prestige · Same active/idle balance (balanced) · 3 prestige layers
Pick a faction, build a kingdom, abdicate, reincarnate, ascend. Every run changes which of eleven factions is optimal.
87% steam55% idle
Idle Wizard
Also prestige · Same active/idle balance (leans idle) · 2 prestige layers
Choose a wizard class, stack spells, transcend. A class-based prestige game with lots of build variety.
86% steam60% idleSwarm SimulatorDormant
Also pure numbers, prestige
Grow an alien hive: larvae, drones, queens, nests, and then the numbers start producing numbers.
80% idleEvolveUpdated
Also prestige · Same active/idle balance (leans idle) · 6 prestige layers
Evolve a species from primordial ooze, build a civilisation, then blow it up in a dozen different ways to start again.
60% idle
NGU Idle
Also prestige · Same active/idle balance (leans idle)
Joke-dense RPG idler with dozens of interlocking systems. Beating a boss is the easy part; allocating energy is the game.
96% steam65% idleTrimpsDormant
Also prestige · Same active/idle balance (balanced) · 2 prestige layers
Breed an army of trimps, push through zones, portal back, and optimise your heirlooms for another hundred runs.
55% idle
Idle Research
Also prestige, pure numbers · Same active/idle balance (balanced)
Research and craft flasks and tubes to generate three kinds of energy, with several prestige types, fights, skills and potion brewing.
85% steam50% idle
Cookie Clicker
Also prestige · 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
Leaf Blower Revolution
Also prestige · Same active/idle balance (balanced)
Blow leaves. Blow more leaves. Somehow blow leaves across multiple dimensions with a crafting system.
94% steam55% idle
Exotic Matter Dimensions
Also pure numbers, prestige · 2 prestige layers
A big-number incremental inspired by Synergism and Antimatter Dimensions, set in an eight-dimensional universe.
4.1★ galaxy
Zen Idle: Gravity MeditationUpdated
Also physics, prestige · Same active/idle balance (balanced)
Upgrade physics-driven balls and stages for income, collect cards for permanent bonuses and prestige with evolving perks, playing passively or with strategy.
50% idle
Kittens GameUpdated
Also prestige · Same active/idle balance (balanced)
Run a civilisation of kittens from catnip fields to space elevators. Deep, slow, and endlessly spreadsheetable.
55% idle