Valve has released exterior CAD files for the Steam Controller under a Creative Commons license, inviting modders and accessory makers to customize the hardware without disclosing internal electronics.

The CAD package includes external shell topologies in STP and STL formats along with engineering diagrams that designate keep-out areas to preserve signal integrity and functionality.

Modders can design 3D-printed accessories such as skins, alternate shells, charging stands, grip extenders, and smartphone mounts, while being mindful of restricted areas like the antenna and magnetic connectors.

The documents specify off-limits zones to avoid interfering with operation, including critical antenna and connector regions.

The report notes the source originated from a Korean publication and was translated for English readers.

Engineering drawings aim to prevent blocking essential ports and antennas and could improve repairability by enabling printed replacement shells.

Valve cautions that modifying the device may void the warranty and that damages from mods aren’t covered.

Commercial terms are restricted; distributed designs must avoid redistribution bans, paid memberships, or modification limits, signaling openness in sharing while prohibiting commercial terms in files.

The initiative prioritizes community experimentation and design flexibility over addressing immediate stock issues, aligning with a trend toward hardware openness and modding support.

GamingOnLinux is cited as the original source, highlighting potential impact on the modding community.

Suggested mod ideas include skins, charging stands, grip extenders, and smartphone mounts, with a concrete example of streaming games from a phone via Moonlight.

The move aims to empower the 3D printing community to create custom components like shells and mounting solutions, while inner electronics remain undisclosed.