How long does it take to beat this game?

[darkshadow23]

MGS4 - 20 hrs.
Uncharted 2 - 9 hrs.
Uncharted - 7 hrs.
CoD 4 - 7 hrs.
MW2 - 5 hrs.
KillZone2 - 13 hrs.
LittleBigPlanet - 6 - 10 hrs.
Resistance 2 - 8 hrs.
Resistance: FoM - 7 hrs.