Killzone 1 sales number

[blowfish]

FilaBrasileiro said:

I have read before, either on the playstation forums or some other forum, that one of the developers for Killzone for PS2 has said that the game sold 2 million worldwide. How come the game is not listed on this website?

 

Thanks

 I know it used to be but it's not on the charts anymore for some strange reason.