Games like The Difficulty Upgrade Tree:R (My version!)
The Difficulty Upgrade Tree:R (My version!) stacks 6 prestige layers. These games share the most with it, and each one says why.

drifter's upgrade tree
Also prestige, slow · 3 prestige layers
A slow, long tree of upgrades with clicking sections and many resets, currently 300 upgrades across 3 layers and 15 sub-layers. Unfinished.
3.7★ galaxy25% idle
The Timewall Tree Remake
Also prestige, slow · 12 prestige layers
A Prestige Tree mod across 12 layers built around long waits on upgrades and challenges, borrowing systems from Antimatter Dimensions and other classics.
3.5★ galaxy
Stellar Evolution: TMT
Also prestige, slow · 4 prestige layers
A very long Modding Tree game with four reset layers and heavy timewalls; late upgrades can take days, and full runs have taken months.
2.8★ galaxy
The Generator TreeUpdated
Also prestige, slow
A Modding Tree game with a compact layout for phones, where most time is spent waiting and the active parts are prestiging and buying upgrades.
3.4★ galaxy70% idle
Antimatter DimensionsUpdated
Also prestige · 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
Clicker Heroes
Also prestige · 2 prestige layers
Click monsters, hire heroes, ascend, transcend. The game that made idle RPGs mainstream on Steam.
90% steam60% idle
The Prestige TreeComplete
Also prestige · 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
Incremental Mass RewrittenUpdated
Also prestige · 8 prestige layers
Gain mass, become a black hole, then an atom, then a supernova. The numbers get absurd quickly and never stop.
4.5★ galaxy60% idle
Realm Grinder
Also prestige · 3 prestige layers
Pick a faction, build a kingdom, abdicate, reincarnate, ascend. Every run changes which of eleven factions is optimal.
87% steam55% idle
The Fly Devourer Tree
Also prestige · 9 prestige layers
Evolve a creature built to eat as many flies as possible, progressing through nine layers so far.
4.3★ galaxy
The Point Tree
Also prestige · 12 prestige layers
A Prestige Tree mod about piling up points across 12 layers with short waits, plus an optional long achievement minigame and a luck-based side layer.
4.0★ galaxy
Exotic Matter Dimensions
Also prestige · 2 prestige layers
A big-number incremental inspired by Synergism and Antimatter Dimensions, set in an eight-dimensional universe.
4.1★ galaxy
SynergismUpdated
Also prestige · 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
Tuba's Tree 2
Also prestige · 4 prestige layers
A grindy tree game with four prestige layers, many rewarding achievements, side layers, tokens, and a custom challenge system. Abandoned but playable.
4.2★ galaxy
Idle Wizard
Also prestige · 2 prestige layers
Choose a wizard class, stack spells, transcend. A class-based prestige game with lots of build variety.
86% steam60% idle
Cookie Clicker
Also prestige
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
World Growth
Also prestige · 5 prestige layers
A Prestige Tree mod with five reset layers, generators, boosters, world tiers, and a small periodic table of upgrades. Takes about 8 to 16 hours.
3.9★ galaxyhas ending
The Longest Incremental
Also prestige · 2 prestige layers
A group-made attempt at a very long incremental, left with two working layers before being abandoned.
4.0★ galaxy
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
Smashing Simulator IdleDormant
Also prestige · 2 prestige layers
Smash everything in sight across an element tree and a second skill tree, with missions, challenges and two prestige layers.
73% steam50% idle
Prestige Layers THE GAMEDormant
Also prestige · 4 prestige layers
An incremental built around stacking prestige layers that boost one another, with four layers so far.
3.8★ galaxyEvolveUpdated
Also prestige · 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% idleTrimpsDormant
Also prestige · 2 prestige layers
Breed an army of trimps, push through zones, portal back, and optimise your heirlooms for another hundred runs.
55% idle
Unnamed Space Idle
Also prestige
A ship, a sector map and a tidy prestige loop. Quietly one of Galaxy's most-played games.
92% steam4.5★ galaxy70% idle