The Steam Deck is a handheld gaming computer produced by Valve, designed to run the large library of games available on the Steam storefront client. Built upon the experiences gained from Valve's earlier ventures with Steam Machine and the Steam Controller, the Steam Deck integrates a custom AMD APU and SteamOS 3.0, a Linux-based operating system. The Steam Deck represents Valve's pivot towards a fully internal hardware development approach, following the challenges faced with Steam Machines' reliance on external manufacturers and the requirement for native Linux game support.
Since its release in February 2022, the Steam Deck has garnered significant attention for its widespread adoption and versatility, including support for both native Linux games and those running through Proton, a compatibility layer for Windows games. Additionally, the Steam Deck features a desktop mode and allows users to install third-party Linux applications. The device has seen multiple revisions, including the introduction of OLED screen models in November 2023. Despite criticism regarding battery life, the Steam Deck has achieved notable commercial success, selling millions of units and influencing the market with its approach to portable gaming, and has spurred interest in similar handheld gaming computers.