If games like Guitar Hero and Wii Fit can be released with their own proprietary controllers, why not something like Metal Gear Solid 4? Evidently that's exactly what Hideo Kojima was thinking at one point during its development, as MGS series producer Kenichiro Imaizumi revealed Kojima was experimenting with a custom controller for the game.
Speaking in a video clip that, in fact, was made to hype Microsoft's Project Natal controller (via Joystiq), Imaizumi explained what this scrapped controller might have been -- and, yes, it sounds exactly like the sort of controller that would come from the mad mind of Hideo Kojima. "We tried running electric shock waves, installing a pulse reader ... we also tried to build a controller that's receptive to the strength of the [player's] grip," Imaizumi explained. "We tried a lot, even a transforming controller."
This raises an interesting question we never thought we'd have to ask: Is it even legal to release a controller that sends electrical shock waves? It also makes us wonder what Kojima now thinks of Nintendo's own very real pulse reader.