GOG.com is a digital storefront for building and playing a collection of classic PC games and modern releases. Its catalog spans genres including role-playing, action, adventure, strategy, open-world, indie, and shooters, with new releases, bestsellers, sales, downloadable content, and some free games. GOG emphasizes DRM-free titles and a gamer-first approach focused on ownership, alongside a 30-day money-back guarantee. Its featured selection includes both older games and contemporary releases, with products available for Windows, Mac, and Linux.

Beyond game sales, GOG offers GOG Galaxy, a desktop application for users, and initiatives such as the GOG Preservation Program, which supports the continued availability of games. The site also features one-click mods, community forums, trailers, a classics collection, a blog, and GOG Patrons programs and hubs. Customers can manage accounts, wishlists, reviews, friends, chat, orders, and redeemed codes, while support resources include contact options and help for Galaxy. GOG.com is operated by GOG sp. z o.o.