What is the most popular PS2 game

There is no "most" POPULARgame and there are many games which are famous over the period of PS2:
But here is a list of the popular PS2 games:
God Of War I & II
Shadow of Colossus
Final Fantasy X
Final Fantasy X-2
Final Fantasy XII
Half-Life Ports
WWE Smackdown V/s Raw Series
Tekken 4
Virtua Fighter 4
Silent Hill 2
Resident Evil 4
ICO
Gran Turismo 4
Devil May Cry Series
Kingdom Hearts
Metal Gear Solid 3 : Subsistence
GTA : Vice City
GTA : San Andread
GTA III