These are the PS2 games I've played so far.
.hack part 1 : Infection
.hack part 2 : Mutation
.hack part 3 : Outbreak
.hack part 4 : Quarentine
.hack G.U. part 1 : Rebirth 
.hack G.U. Part 2
Ace Combat 4 
Ace Combat 5
Ace Combat Zero
Arc the Lad
Baldur's Gate Dark Alliance 2
Bard's Tale
Berserk
BloodRayne 2
Blood Will Tell
Brothers in Arms : Road to Hill 30
Bully
Champions of Norrath
Champions Return to Arms
Darkwatch
Death by Degrees 
Demon Stone
Devil Kings
Devil May Cry
Devil May Cry 2
Devil May Cry 3 : Dante's Awakening
Dragon Quest VIII : Journey of the Cursed King
Drakengard
Drakengard 2 : Love Red, Ambivalence Black
Dynasty Warriors 5
Fatal Frame
Fatal Frame II : Crimson Butterfly
Fatal Frame III : The Tormented
Final Fantasy X
Final Fantasy X-2
Final Fantasy XII
Front Mission 4
Front Mission 5
Fu Un Shinshengumi
G Generation Neo
G Generation Seed
Genji : Dawn of the Samurai
Ghost Hunter
Ghost in the Shell : Stand Alone Complex
God of War
Gran Turismo 3
Gran Turismo 4
Grandia III
Haunting Ground
ICO
Kessen III
Killer 7
Kingdom Hearts
Kingdom Hearts II
Kuon
Lord of the Rings : Return of the King
Lord of the Rings : The Third Age
Marvel : Ultimate Alliance
Mercenaries
Metal Gear Solid 2 : Sons of Liberity
Metal Gear Solid 3 : Snake Eater
Midnight Club 3 : DUB Edition
Mobile Suit Gundam : Encounters in Space
Mobile Suit Gundam : Lost Wars Chronical
Mobile Suit Gundam Seed : Never Ending Tomorrow
Monster Hunter
Monster Hunter G
Musashi Samurai Legend
Okami
Onimusha : Warlords
Onimusha 2 : Samurai Destiny
Onimusha 3 : Demon Seige
Onimusha 4 : Dawn of Dreams
OZ / Over Zenith
Prince of Persia : The Sands of Time
Prince of Persia 2 : Warrior Within
Prince of Persia 3 : The Two Thrones
Project Altered Beast
Radiata Stories
Red Ninja : End of Honor
Resident Evil : Code Veronica
Resident Evil : Outbreak
Resident Evil : Outbreak File#2
Resident Evil 4
Rise of the Kasai
Samurai Warriors
Samurai Warriors
Samurai Warriors Extreme Legends
Samurai Western
Shadow Hearts 2 : Covenant
Shadow Hearts 3 : From the New World
Shadow of Rome
Shadow of the Colossus
Shin Megami Tensei : Digital Devil Saga
Shin Megami Tensei : Digital Devil Saga 2
Shin Megami Tensai : Devil Summoner
Shin Megami Tensei : Nocturne
Shining Tears
Spartan : Total Warrior
Star Ocean 3
Suikoden III
Suikoden IV
Suikoden V
Tales of Destiny 2
Tenchu : Fatal Shadows
Tenchu : Wraith of Heaven
The Incredable Hulk : Ultimate Destruction
The Mark of Kri
The Story of Hero Yoshitsune
The Warriors
Tim Burton's Nightmare Before Christmas
Tomb Raider Legend
Under the Skin
Valkyrie Profile 2 : Silmeria
Way of the Samurai 2
X-Men Legends
Xenosaga
Xenosaga II
Xenosaga III
Yakuza
Ys : Ark of Napishtim
Z.O.E.
Z.O.E. : Second Runner
Total : 122
Games recommanded playing
Import version played
As depicted in the icon, its a piece of shit, not recommanded.