How long does it take to beat this game?

[--OkeyDokey--]

Majora's Mask: 16 hours
Wind Waker: 23 hours
Twilight Princess: 75 hours (I must've fucked around big time in that game :P)
Metal Gear Solid 4: 17 hours
Super Mario Galaxy: 32 hours (242 stars)
Mass Effect: 20 hours
Gran Turismo 4: 500 hours