Have you ever wondered how old your favorite video game character will be when they die? Defunct Games puts that question to the test. By studying the lives of gaming's biggest stars, we are able to accurately predict when they'll croak. (Note: All characters start at 79 years old, the national average for life expectancy.)

NAME: Dr. Robotnik (aka Dr. Eggman)

BORN: Sometime in 1948

GAMOGRAPHY: Every Sonic the Hedgehog game, most of the spin-offs and many of Sega's cartoon sports games. Will be in the upcoming Mario & Sonic at the London 2012 Olympic Games. Seriously.

BIOGRAPHY: Whether you call him by his real name or Dr. Eggman, Ivo Robotnik is the one true villain of the Sonic the Hedgehog franchise. He's best known as the mad inventor who threatens to take over the world with his increasingly dastardly creations. Thankfully Sonic and pals are there to stop him.

Life Expectancy - 54 Years Old (1948 - 2002): Between his stressful life, an unnatural fear of furry animals and a massive weight issue, Dr. Robotnik should already be dead. Thankfully this is a kid's game and the Eggman will never die. If this was the real world Pfizer would be camped outside of his fortress trying to sell him everything they have.