Do you need something special for this year's Comic Con? Something no one else even thought of? Read on!
Steps
Wear a generic button-up shirt. This can be of any color.
Get a red necktie. Wear it closely and tight.
Get a pair of slacks or dress pants. They can be black, grey, or tan. These do not necessarily have to be expensive.
Wear a tan trench coat. You can leave it open or close it; it's your choice.
Wear a pair of running shoes. The only thing giving Old Snake away was his need for readiness.
Now comes the accessories. Wear a pair of black gloves. Get a pair of reading glasses. Comb or slick your hair neatly with some hair gel. If you want to, you can don Snake's bandana.
Tips
Hunch over slightly, giving the impression of the aging effect on Snake.
Carry a toy pistol to give a hint to non-fans of Metal Gear Solid.