All of them including the PSP games.

GOW is probably my favorite new series to emerge this century, and I've played and loved all the games except the mobile one God of War: Betrayal. I've also played both the PS3 collections, so in total I've probably played the first two games close to half a dozen times each.

I didn't even know there were that many games!

I played a couple of hours of GOW 2 on PS2 but I returned the game before I completed it as I was running out of time or ells I would not get my money back

it was good though

I played the GOW3 demo.

6/10. 

I got platinum trophies for all three console titles. I haven't played much of the PSP games, though...

All of them, playing the challange of Olympus now in GOW3, Its a bitch!

All of them, even the mobile game.
1 and 2 on PS2, then again those games in HD on the PS3 and GoW3, and both PSP games.

Where did the 3 GOW titles option go? That was mine.

Not sure what you mean by "trilogies don't count" but I've played and beaten God of War 1, 2, and 3. Have played both PSP games but not beaten. Plan on getting Ascension.