How the estimate works
Portal has 175,270 Steam reviews. Most games sell between 20 and 50 copies for every review, with 30 as a typical ratio, so that range gives the estimate. Revenue multiplies copies by the base price, then takes off average discounts, refunds, sales tax, and Steam's tiered cut.
The estimate covers Steam only. It leaves out other platforms, subscription services, key sales, and bundles, and viral hits often get fewer reviews per copy than the typical ratio.
Frequently asked questions
How many copies has Portal sold?
Portal has sold about 5.3 million copies on Steam, with a likely range of 3.5 million to 8.8 million. The estimate is based on its 175,270 Steam reviews, since most games sell 20 to 50 copies for every review.
How much money has Portal made?
Portal has made about $53 million in gross revenue on Steam. After discounts, refunds, sales tax, and Steam's cut, the developer keeps about $22 million.
How much is Portal on Steam?
Portal costs $9.99 on Steam at its base price in the US store. Sales and regional pricing lower what many players actually pay.
When did Portal come out?
Portal was released on Steam on October 10, 2007.