Alt.ctrl.gdc
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alt.ctrl.GDC is a unique showcase of alternative controllers created by independent developers. alt.ctrl.GDC exhibitors are chosen through an open submission process which is free to enter and open to all. Source.
Founded in 2014 by John Poulson, alt.ctrl.GDC is a part of the Game Developers Conference in San Francisco.
For a full list of games and developers featured in alt.ctrl.GDC check out List of Game Shown at alt.ctrl.GDC.