On August 14, Haguruma Works released a Steam demo of its co-op puzzle game Gear Quartet. Japanese and English are supported. The full version is planned for October 2026 on Steam and Nintendo Switch.

Players become four gearwrights climbing a clock tower by meshing gears together. Each player controls a gear of a different size, and platforms move only when everyone's rotation meshes. Solo players can switch between the four characters.

The demo includes the first 12 stages plus one special time-attack stage. Save data carries over to the full version.