# Valve releases Steam Controller CAD files under CC BY-NC-SA 4.0

Valve released CAD files for the new Steam Controller and its Puck shortly after the hardware started shipping. The files cover the **external shell** ("surface topology") of each device — `.STP` and `.STL` formats plus an engineering diagram. The diagrams mark zones that must remain uncovered for RF and other functional reasons, so accessory designers know where they cannot place material without breaking the device.

The intended audience is modders making skins, charging stands, grip extenders, smartphone mounts. Valve has done this before — Steam Deck, Valve Index VR, and the original Steam Controller a decade ago — so the release is welcomed but not unexpected.

## Licensing

[CC BY-NC-SA 4.0](http://creativecommons.org/licenses/by-nc-sa/4.0/): attribution required, non-commercial use only, derivative works must share alike. Commercial entities making accessories for sale are directed to contact Valve directly to discuss terms.

This is the standard "hobbyist mod ecosystem yes, third-party accessory market under our terms" stance. The non-commercial clause is not the open-hardware default (which is typically CC BY-SA 4.0 or the CERN OHL family) and is a deliberate choice to keep the commercial accessory market negotiated bilaterally rather than open by license.

## Why this is a wiki entry

It's a small piece, but it's a precedent worth filing: a major game-hardware vendor making the *shell* of a flagship device freely modifiable while keeping the *commercial use* gate. Pattern likely to keep recurring with the next Steam Deck refresh, future Valve hardware, and competitors choosing whether to match.

Source: Digital Foundry coverage citing the [Steam Hardware announcement](https://steamcommunity.com/groups/steam_hardware/announcements/detail/702141174212723353).