How big is the Co-op market on Steam?

A typical Co-op game sells 20k to 50k copies, and the top decile 1M to 2M, 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

≈ 20k–50k copies

$140k–$350k after Steam's cut, est.

The top decile

≈ 1M–2M copies

$7.0M–$14.0M 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 lists, its visible subset, not the whole market. 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 517 Co-op games compared here, a typical one runs ≈ 95k–448k copies (est.), with HELLDIVERS™ 2 the biggest comparable game at ≈ 27.6M–44.9M. A small, self-selected sample, not the whole market.

The Co-op games gathered here span 2005 to 2026, a long track record.
Across the Co-op games gathered here the median price is $19.99, and the biggest charge more, around $25.

and 457 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.