How much revenue did Half-Life: Source make?

$2.9M–$7.8M after Steam's roughly 30% cut, derived from the copies estimate and its price.

How many copies did Half-Life: Source sell?

1.1M to 1.7M copies, based on its 17k Steam reviews. This is a labeled estimate from the review count, not exact sales.

Estimated copies sold: ≈ 1.1M–1.7M; $2.9M–$7.8M after Steam's cut $5.3M–$12.0M before Steam's cut; from 17k reviews (Mixed)

Copies are estimated from the public review count, adjusted for release year, and cross-checked against SteamSpy's own estimate.

We don't have enough similar games to place Half-Life: Source in its genre yet. The numbers above are Half-Life: Source's own.

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