Last year, Valve sold off its last batch of Steam Controllers at $5 a pop, a bargain for what we still consider the best PC controller for games that don’t officially support them, and seemingly an end to that project. But Valve may not be done with its experiments in handheld game input. A recently published patent application filed by Valve describes a Steam Controller model with detachable parts.

Spotted by Tyler McVicker of Valve News Network, the patent is titled “Handheld controllers with swappable controls.” It’s exactly what it sounds like.

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