How big is the Co-op market on Steam?

A typical Co-op game sells 4k to 7k copies, and the top decile 398k to 647k, based on the 6,249 games SteamSpy lists for the tag (its visible subset). Labeled estimates from review counts, not exact sales.

The realistic ceiling for Co-op games

Two honest views of what Co-op games do on Steam: the whole market from a systematic sample, and the games gathered here. Kept separate on purpose.

The market

A typical game sells

≈ 4k–7k copies

$12k–$31k after Steam's cut, est.

The top decile

≈ 398k–647k copies

$1.1M–$2.9M after Steam's cut, est.

Half the reviews in SteamSpy's sample of 6,249 Co-op games sit with 47 of them.

Based on the 6,249 Co-op games SteamSpy listed on August 30, 2026. It misses the games that barely sold, so these figures flatter the genre. Games are grouped by the tags players give them, which are applied loosely, so a genre's edges are fuzzy. Owners are SteamSpy estimates from review counts, not exact sales.

The Co-op games gathered on wishvane

Across the 792 Co-op games compared here, the middle one runs ≈ 70k–387k copies (est.), with HELLDIVERS™ 2 the biggest comparable game at ≈ 28.7M–46.7M. These are the games people chose to compare, not a sample of the genre, so they run far larger than the market figures above.

The Co-op games gathered here span 2005 to 2026, and 159 of the 789 of them shipped in the last two years.
The biggest Co-op games here share nothing more specific than the genre; individually they lead with Open World and Pirates.
Across the Co-op games gathered here the median price is $14.99, and the biggest charge more, around $25.

and 732 more

Building a Co-op game? This genre already ran your experiment. Add the games yours will be compared to and see what's realistic, before you spend months on it.