Dark Souls has been completed using only the power of the voice.
Reddit user GMABT used the program VoiceAttack to convert his voice commands into keyboard presses, and was able to complete Dark Souls in 30 hours. The 1.5 delay on input recognition made things extra difficult.
“30 hours of suffering, almost losing my voice several times, and 485 deaths later, I finally completed the game,” he writes. 111 of those deaths were to the boss Ornstein and Smough.