Steam is Valve's PC game distribution platform. Unlike every other store in this list, Steam almost never issues shared promo codes — discounts are applied directly to the product price during sales. That is why every offer on this page is the Deal type: clicking takes you to an already discounted product page with no code to paste.

The sale calendar is what matters. The Summer Sale runs around late June and the Winter Sale around late December, with smaller themed events through the year. Historically, the discount on a given title in a themed event matches its price in the following major sale, so there is rarely a reason to buy at a mid-tier discount.

Steam's refund policy is the underrated feature here: refunds within two weeks of purchase and under two hours of playtime, no reason required. It makes buying at a discount lower-risk than at any key reseller, where refunds are usually not available at all.

1. Click Get deal — Steam opens on the discounted product page.
2. Sign in to your Steam account before adding to the cart.
3. The discount is already in the price; there is no code field to fill.
4. If a title is not on sale yet, add it to your wishlist — Steam emails you when the discount lands.