Updated October 5, 2026 · 19 games

The Best Free Idle Games

Some of the best games in the genre cost nothing and never ask for anything. These are free to play start to finish, not "free" with an asterisk.

1

Antimatter Dimensions 9.4

web, steam, android, ios · free · hybrid · high complexity

The genre's reference implementation. Deep, free, no pay-to-win, and endlessly layered prestige. The one everyone else gets measured against.
Full review →
2

Idle Obelisk Miner 9.2

android, ios, web · free · hybrid · high complexity

A genuinely deep mining incremental that does the unthinkable in mobile idle: zero ads, not even optional ones. Prestige artifacts, then whole new systems (stargazing, archaeology, fishing) keep unfolding for hundreds of hours.
Full review →
3

UP

Universal Paperclips 9.2

web, ios, android · free · active-heavy · medium complexity

The AI-alignment thought experiment as a four-hour masterpiece. You start clicking 'make paperclip' and end up dismantling the universe. No prestige, no grind — just a perfectly paced three-act arc that every incremental since has quietly copied.
Full review →
4

S

Synergism 8.9

web, steam · free · hybrid · brutal complexity

A monument to layered progression: reset systems stacked on reset systems, each unlocking the next, for literally thousands of hours. Free, community-beloved, and now on Steam as of 2026.
Full review →
5

Cookie Clicker 8.8

web, steam, android, ios · free · hybrid · medium complexity

The genre's ground zero. It invented the vocabulary everyone else borrows, and somehow the jokes still land a decade later. The Steam version with achievements is the definitive way to play.
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6

KG

Kittens Game 8.8

web, steam · free · hybrid · medium complexity

The thinking person's idle game: a spreadsheet-y cat-village sim with a tech tree so deep it feels like a civilization builder wearing an incremental's clothes. Twelve years old and still getting updates.
Full review →
7

AD

A Dark Room 8.7

web, android, ios · free · hybrid · low complexity

The minimalist classic that proved a text incremental could be art. It starts with one button — 'stoke the fire' — and quietly becomes something you won't see coming. Topped App Store charts in 70 countries for a reason.
Full review →
8

Unnamed Space Idle 8.7

steam, linux · free · hybrid · high complexity

The community's Best F2P pick for good reason: a slow-burn, unfolding sci-fi idler where every few hours a whole new system quietly opens up and re-contextualizes what you thought the game was. Free, no ads, no store, still in active Early Access.
Full review →
9

Bitburner 8.6

web, steam · free · active-heavy · brutal complexity

An incremental where the automation is code you actually write in JavaScript. Free, open-source, and the closest thing to a programming sandbox the genre has — the more you script, the more the game plays itself.
Full review →
10

NGU Idle 8.6

web, steam · free · pure-idle · high complexity

Aggressively unserious on the surface, genuinely enormous underneath. Free on Steam, no P2W, and a dozen systems that slowly reveal how they feed each other. A cult favorite for good reason.
Full review →
11

Exponential Idle 8.5

android, ios · free · hybrid · high complexity

An idle game that's secretly a love letter to mathematics: progress by pushing equations, then unlock custom 'theories' with their own mechanics. Free, ad-free, and quietly one of the smartest games on mobile.
Full review →
12

Trimps 8.5

web · free · hybrid · brutal complexity

A monster of a web incremental that hides staggering depth behind an ugly UI. Push far enough and it becomes a full strategy game about breeding an army and portaling for permanent power.
Full review →
13

Idle Slayer 8.4

steam, android, ios · free · hybrid · medium complexity

A pixel-art auto-runner welded to a soul-collecting idle engine, with an Ascension tree deep enough to reward planning. Cross-platform cloud saves, 600+ achievements, and a solo dev who's still shipping major updates six years on.
Full review →
14

Realm Grinder 8.4

web, steam, android, ios · free · pure-idle · brutal complexity

The faction-swapping grandaddy of strategic idlers: align with elves, demons, fairies and more, each rewriting how you play. Three stacked prestige layers and a decade of depth keep it a genre benchmark.
Full review →
15

Theresmore 8.4

browser, android, ios · free · active-heavy · high complexity

The rare incremental that's genuinely a 4X in disguise — a tech tree, real armies, diplomacy and conquest layered onto number-go-up. A perennial r/incremental_games favorite, entirely free, no ads, and the new 1.2 idle queue system finally softens the click-heavy early game.
Full review →
16

Leaf Blower Revolution 8.3

steam, android, ios · free · pure-idle · medium complexity

Exactly as silly as it sounds and far deeper than it has any right to be. What starts as blowing leaves becomes a sprawling automation game with fishing, gems, and a hundred systems. Free, no P2W, still updated.
Full review →
17

Revolution Idle 8.3

steam, android, ios · free · pure-idle · low complexity

Full-released in May 2025, this is the friendly on-ramp to number-go-up: fill a circle, multiply, prestige, repeat, with new layers (Promotion, Infinity, Unity) unfolding as you go. Low friction, 670+ achievements, still actively expanding.
Full review →
18

Legends of IdleOn 8.2

web, steam, android, ios · free · pure-idle · high complexity

The idle MMO that actually works: run a whole roster of characters across six worlds and 38 classes, each grinding a different system while you're away. Fully released Nov 2025 after years of steady growth.
Full review →
19

Idle Skilling 7.5

steam, android, ios · free · pure-idle · medium complexity

The prolific LavaFlame2's earlier idler: 21 skills plus pet combat and spelunking sub-games, all ticking away at once. Free, sprawling, and a lighter on-ramp to the same dev's bigger IdleOn.
Full review →