How old is Legend of Zelda?

28 years old. Here's a list of games in the series (except for those CDi ones):Legend of Zelda, 1986

Zelda II: The Adventure of Link, 1987

A Link to the Past, 1992

Link's Awakening, 1993

Ocarina of Time, 1998

Majora's Mask, 2000

Oracle of Seasons and Oracle of Ages, 2001

Wind Waker, 2003

Minish Cap, 2005

Twilight Princess, 2006

Link's Crossbow Training, 2007

Phantom Hourglass, 2007

Spirit Tracks, 2009

Skyward SWord 2011

A Link Between Worlds, 2013