The Shamrock Series started in 2009.
In 2009 they played Washington State in San Antonio
In 2010 they played Army at Yankee stadium
In 2011 they played Maryland at Fedez Field
In 2012 they played Miami at Soldier field
In 2013 they played Arizona State at JerryWorld
This year they played Purdue in Indianapolis.
Notre Dame hasn't played "home" games as neutral site games. These have all been 1 game affairs. Last year's Arizona State game was part of a 1-1-1 agreement and Notre Dame got Purdue to delay their annual series by playing a neutral site game this year under ND control.
Notre Dame doesn't give up home games they get opponents to play them in neutral site games. Miami,Maryland,Army,Washington State didn't play their home games at a neutral site these were games like last year's Penn State game a true 1 game series.