hardware

Steam Boy: Steam Deck squeezed into a Game Boy‑sized 3D‑printed case

Reddit user PhyFawkes has built a work‑in‑progress Steam Boy that fits a Steam Deck motherboard, battery, cooling and speakers inside a Game Boy‑style 3D‑printed PETG shell. The handheld's footprint is under half the size of an original Steam Deck and could fit in a large jacket pocket, but its internals are stacked and thicker. Controls are reduced to a D‑pad, four face buttons, two system buttons, one thumbstick and one touchpad, and shoulder triggers remain unfinished. The chosen 1200×1080 90Hz OLED screen is not yet connected and requires an adapter board and a BIOS mod to work.

• Creator PhyFawkes built the Steam Boy as a WIP using a 3D‑printed PETG chassis to house a full Steam Deck motherboard with APU heatsink, fans, battery, internal speakers and separate audio board.
• The device’s hardware is stacked Tetris‑style, producing a chassis with less than half the original Deck’s footprint but a chunkier depth that can still fit in a large jacket pocket.
• Button layout has been pared down to a D‑pad, four face buttons, two system buttons, one thumbstick and one touchpad; shoulder triggers are listed as unfinished.
• Display work remains incomplete: a 1200×1080 90Hz OLED panel is selected but not hooked up, requiring an adapter board between the Deck motherboard and the panel plus a BIOS modification.