Metal Gear Solid 3 sold less than Melee or Sunshine.
Silent hill and Collossus was a niche games...
That's not the reason, what is the best seller on PS2? Grand Theft Auto...
The TRULY reason is just the marketing, the sales of the PS2 games confirmed this.
they sold to nintendo fans not core gamers (other people) . Xbox got GTA it didnt make a difference