8. Beating Metal Gear Solid With The Life-Draining Cigarette Permanently Equipped
One of the more amusing if also pretty sadistic self-imposed challenges out there is in forcing oneself to play the entirety of Metal Gear Solid - or as much as the game will allow you - while equipping Snake's famously life-draining cigarettes. Though it isn't possible to spontaneously drop dead from equipping a cig for too long - because
that would be dumb - your life can be severely drained by keeping it equipped, ensuring that players have to remain on their toes at all times, especially during boss battles. What really makes this a challenge is that it essentially makes rations pointless, and basically keeps you extremely vulnerable for the vast majority of the game. As such, stealth really is the name of the game, and thankfully it wasn't until the fourth game that the AI got smart enough to smell your cig smoke. On the plus side, the cigs will help you see any pesky infra-red beams that will release poison gas, as is particularly handy in the Tank Hangar as you make your way to the Snowfield.