What Is an Autobattler? The Auto-Chess Genre Defined

An autobattler is a strategy game where you spend each round buying and positioning units on a board, then watch them fight automatically against another player’s board. You don’t control the units in combat — you control the team composition and the placement. The genre was invented in January 2019 with a Dota 2 custom map called Dota Auto Chess, and within months it had spawned standalone games from Valve, Riot, and Tencent. Here’s what it actually is and why it caught fire so fast.

The core loop

An autobattler round has two phases. First, the planning phase: you have 30-60 seconds and some gold. You buy units from a randomized shop, position them on your board, and decide what to upgrade. Second, the combat phase: the planning phase ends, and your board fights another player’s board automatically. The winner deals damage to the loser. You lose health each round you lose. When your health hits zero, you’re out. Last player standing wins.

Games are typically 8 players in a free-for-all, lasting 30-40 minutes per match. Each player faces a different opponent each round (round-robin within the lobby). You see all your opponents’ boards on a minimap or rotating display, so you can prepare counters.

The genre’s defining inventions

Shared, randomized shops

The shop is the engine. Each round you can spend gold to refresh a list of 5 units drawn from a shared pool. Drawing the same unit multiple times lets you combine three copies into a stronger version (a “two-star” version), and three two-stars into a three-star. So the same shop randomization that frustrates you also creates winning streaks when you hit your needed unit three rounds in a row.

Critically, the unit pool is shared across the lobby. If another player is buying the same unit you need, copies of it become rarer in your own shop. This adds an information warfare layer — competent players read what their opponents are building from what’s not appearing in the shop.

Trait synergies

Every unit has two or three traits (origin and class, typically). Having multiple units of the same trait on your board activates trait bonuses — three Warriors give all your units armor, four Sorcerers give magic damage, six Knights give a damage shield. The game becomes a constraint satisfaction puzzle: which traits do you have enough cheap units to activate, and which would you rather skip?

This is what makes each game feel different. The 30+ traits across the game’s roster mean each match’s high-value compositions depend on what the shop happens to offer.

The level / roll tension

You spend gold on three things: buying units from the shop, refreshing the shop (“rolling”), or leveling up (which expands the size of the army you can field, but doesn’t directly buy units). The strategic puzzle is balancing these three sinks. Level up early and you can field more units, but they’ll be lower-tier. Roll down at the right level and you can fish for a specific high-cost unit. Save gold and you earn interest, but you can’t deploy a strong board against current threats.

The best players don’t play one strategy — they read the lobby and pivot based on what’s available.

Where the genre came from

Drodo Games, a small Chinese studio, released Dota Auto Chess as a custom Dota 2 mod on January 3, 2019. It used Dota’s hero roster and engine but introduced the autobattler loop. It exploded within weeks. By February, every major game company was building their own version.

Valve and Drodo had a public falling-out over publishing rights; Valve made Dota Underlords while Drodo released a standalone Auto Chess with non-Dota art. Riot launched Teamfight Tactics (TFT) inside League of Legends in June 2019. Blizzard released Hearthstone Battlegrounds in November 2019. Within a single year, the genre went from custom map to a category with four major commercial games. The Wikipedia entry on auto battler covers the chronology in more detail.

The games that defined the genre

Dota Auto Chess (January 2019)

The originator. A custom Dota 2 map by Drodo Games. Uses Dota heroes (with proper names and visual assets) on an 8×8 board. The shop-place-fight loop and the combine-three-to-upgrade mechanic were both established here. Still playable as a custom map, though most players have moved to one of the standalones.

Teamfight Tactics (June 2019)

Riot’s standalone autobattler, built into the League of Legends client. Uses League champions and a “Sets” system that resets the unit roster every 4-5 months, so the meta is in constant flux. TFT is the most-played autobattler in 2026 by a wide margin, partly because of its constant content cadence and partly because it ships with League’s massive distribution. Has both PC and mobile versions, free.

Auto Chess (June 2019, mobile)

Drodo’s official standalone, separated from Dota IP. Released for mobile first, later PC. Uses a custom roster of generic-fantasy characters. Smaller player base than TFT but the closest game to the original Dota Auto Chess experience.

Dota Underlords (June 2019)

Valve’s standalone, built using the Dota IP that Drodo couldn’t use after the split. Polished, free, and well-balanced — but Valve effectively dropped support in 2020, and the game has been on life support since. Still playable.

Hearthstone Battlegrounds (November 2019)

Blizzard’s reinterpretation, played inside Hearthstone. Uses Hearthstone minions and adds Heroes — each player picks a hero with a unique passive ability at the start of the game. The hero choice gives Battlegrounds more strategic identity than its competitors and remains one of the most-played autobattlers, with new content and balance updates ongoing.

Why the genre caught fire

Three reasons. The matches are spectator-friendly — units fighting on a fixed board are more legible than MOBA team fights, which made the genre broadcast well on Twitch. The input demand is low — you’re making decisions, not executing mechanics — which makes the genre accessible on mobile and to older players. And the formula is portable for developers: once you have a roster with traits, building a new autobattler is mostly content design.

The genre in 2026

The boom has settled. TFT and Battlegrounds have consolidated their position; Underlords is on life support. Newer entries — Mechabellum, Backpack Battles — explore the design space in different directions. The autobattler is a mature genre with an actively engaged player base. If you’ve never tried one, TFT and Battlegrounds are both free in your existing game launchers. For something quicker between matches, the Chrome Dino game at the top of this site is the no-decision palate cleanser.

Frequently asked questions

What does “autobattler” mean?

It refers to the genre’s defining feature: combat resolves automatically after the player finishes positioning their units. The “battler” fights itself (“auto”). The player’s role is in team composition, not direct unit control.

Is autobattler the same as auto chess?

“Auto chess” was the original genre name, derived from Dota Auto Chess. “Autobattler” emerged as a more neutral term as the genre expanded beyond chess-themed games. The two terms refer to the same genre in 2026.

What’s the best autobattler to start with?

Teamfight Tactics if you have an existing League of Legends account; it has the most polish, the most players, and constant content updates. Hearthstone Battlegrounds if you’re already in Hearthstone. Both are free.

Are autobattlers free to play?

Almost all of them are free. Monetization is through cosmetic skins, battle passes, or arena tokens. The major autobattlers (TFT, Battlegrounds, Auto Chess) do not lock units behind paywalls — every gameplay element is available to free players.

How long does an autobattler game last?

30-40 minutes for a full lobby (8 players). The game ends when one player remains. Top-4 finishes count as wins in most ranked systems, so games can also “end” for individual players after 20-25 minutes if they get knocked out earlier.

The bottom line

An autobattler is the strategy genre that figured out you don’t need to click during the fight to make it interesting — you just need the build-and-watch loop to be tight enough that placement matters. Dota Auto Chess proved the formula in 2019, the major studios cloned it within months, and the genre has been a steady presence ever since. If you like strategy games and have never tried one, an evening with TFT or Battlegrounds is a low-cost experiment that often pays off.