10 Video Game Characters Who Bared Nipples Before Mario
7. Raiden/Solid Snake/Liquid Snake
It's quite possible 'Metal Gear Solid' refers to the rock-hard nipples frequently on display throughout the series. The Snake boys aren't shy about unbuttoning their shirts.
Admittedly, both Solid Snake and his facsimile Raiden are forced to declothe under the duress of Revolver Ocelot. Odd chap, Revolver. Not only is he an imitation Lee Van Cleef named after a small and relatively harmless South American cat, but he also revels in administering torture with the belief that nudity somehow makes it more effective. He made the mistake of allowing Solid Snake to leave his trousers on, which ultimately bit him in the bottom. Didn't make that error the second time.
As for Liquid, well, there's no real justification. His final act of wanton clotheslessness can best be explained as 'drama'.