The Boss

The Boss's Horse is a character appeared for the first time in "Metal Gear Solid 3: Snake Eater".

He was an Andalusian that served as The Boss' trusted steed.

He dies during the events of "Metal Gear Solid: Peace Walker".

Trivia

 * In Metal Gear Solid V: The Phantom Pain, a horse with a great resemblence to The Boss' horse, D-Horse, is available to Snake as a Buddy.