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

Grim Clicker
Also clicker, prestige, upgrade tree
A dark fantasy clicker RPG with an immortal hero, a big skill tree, item enchanting, and a ritual reset that makes each run stronger.
79% steam50% idle
Swarm Simulator: Evolution
Also pure numbers, prestige, clicker
Hatch larvae into drones and ever bigger bug units, sacrificing smaller ones and ascending repeatedly to grow a galaxy-scale swarm.
78% steam
CryptoClickers: Crypto Idle Game
Also prestige, upgrade tree, pure numbers
A fake crypto incremental that reaches e10000-scale numbers, with two prestige layers, 21 challenges, speedrun challenges, two upgrade trees and weekly events.
65% steam
Incremental InfinityUpdated
Also pure numbers, prestige, clicker
A Scratch-born number game with three prestige layers and part of a fourth, built around reaching a black hole at the end.
58% steam2.9★ galaxyhas ending
drifter's upgrade tree
Also prestige, clicker, upgrade tree
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
IdleTaleUpdated
Also clicker, prestige, upgrade tree
A clicker RPG where tapping kills monsters for gold that keeps generating while you are away. Talent trees, dungeons, loot and ascension resets that multiply future runs.
57% steam50% idle
Chicken ClickerDormant
Also clicker, prestige, upgrade tree
Click chickens and run a coop, with prestige, multiple currencies, special events and a large upgrade tree. A take on Cow Clicker.

Idle Slayer: Addictive ClickerUpdated
Also clicker, prestige, upgrade tree
Slay monsters and bosses across many worlds for coins, with a big skill tree, ascensions and offline progress.

Matter GridDormant
Also clicker, upgrade tree, prestige
Click nodes to fill a grid with matter, spend skill points across several paths, and reset for bonuses that unlock new systems.

Cookie Clicker
Also clicker, 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
(the) Gnorp Apologue
Also pure numbers, upgrade tree
Strike a rock for shards and hire a growing crew of gnorps to smash and haul them, stacking synergies until the numbers explode.
96% steam
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
Clicker Heroes
Also clicker, prestige
Click monsters, hire heroes, ascend, transcend. The game that made idle RPGs mainstream on Steam.
90% steam60% idle
Kiwi Clicker - Juiced Up
Also clicker, prestige
Push kiwis through an upgradable delivery line, clear bottlenecks, and pick professions that favor clicking, potions or automation.
95% steam50% idle
Cauldron
Also upgrade tree, pure numbers
A young witch grinds minigames for resources that power up her party, uncovering the map through turn-based fights and huge skill trees.
96% steam
Click and ConquerUpdated
Also prestige, upgrade tree
Bomb a fog-covered grid to uncover enemies, invest in passive income and power across 12 maps, and prestige for permanent upgrades in a two-to-four-hour run.
92% steamhas ending
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
FEED THE AI
Also prestige, upgrade tree
A short, very active incremental about an AI you feed with data. Shape it into a Protector, Rational or Tyrant; each ending makes the next run stronger.
90% steam3–9h ending0% idle
Scratch Inc.Updated
Also prestige, clicker
Scratch cards for points, upgrade grids and multipliers, automate the scratching and prestige through several layers across industries.
90% steam
Time Clickers
Also clicker, prestige
Shoot cubes for gold, upgrade your pistol and hire a sharpshooter squad, then trade Time Cubes for artifacts after wave 100.
88% steam50% idle
PickCrafter
Also clicker, prestige
Break blocks with a growing arsenal of pickaxes, forge gear, and prestige through ascension tiers while exploring biomes up to Mars.
86% steam50% idle
It's FineUpdated
Also prestige, upgrade tree
Survive the last 24 hours of a game dev crunch under your dog manager. Each station has its own mechanics, sleep powers a deep prestige tree, and there are alternate endings to find.
89% steamhas ending
This Ain’t Even Poker, Ya Joker
Also prestige, clicker
Flip card hands for money, grow a hand past five cards, send minions on expeditions and reset for poker chips as you try to beat a jester and escape.
86% steamhas ending
Slots & Diapers
Also clicker, prestige
Run a casino where hired seniors spin the slots for you, trading odd byproducts for boosters and chasing mega jackpots for permanent upgrades.
88% steam