As of right now PS2 makes up the vast bulk of my collection. There's quite a lot of shite in it but also a few gems, and as such I've almost filled two medium-sized bookcases with games.
Almost.
I've got enough space left for just one more game and I'm open to suggestions over which one it should be. It needs to have been released in a PAL territory (recently got rid of my NTSC PS2) and not be prohibitively expensive- not that many PS2 games are nowadays. Here's what I got so far:
Activision Anthology
Amplitude
Aqua Aqua: Wetrix 2
Area 51
Art of Fighting Anthology
Atari Anthology
Black
Bombastic
The Bouncer
Burnout 3: Takedown
Burnout Dominator
Bust-a-Bloc
Buzz! The BIG Quiz
Call of Duty: Finest Hour
Canis Canem Edit
Capcom Classics Collection Vol. 1
Capcom Classics Collection Vol. 2
Capcom Fighting Jam
Castlevania (Lament of Innocence)
Clock Tower 3
Contra: Shattered Soldier
Crash Bandicoot: Wrath of Cortex
Crash of the Titans
Death by Degrees
Destroy All Humans!
Destroy All Humans! 2
Deus Ex
Devil May Cry
Devil May Cry 2
Devil May Cry 3: Dante's Awakening
Dirge of Cerberus: Final Fantasy VII
Disgaea: Hour of Darkness
Disgaea 2: Cursed Memories
Dragon Quest: The Journey of the Cursed King
Drakengard
Drakengard 2
Driv3r
Dynasty Tactics
Dynasty Warriors 2
Dynasty Warriors 3: Xtreme Legends
Dynasty Warriors 4 Empires
Dynasty Warriors 4: Xtreme Legends
Dynasty Warriors 5: Xtreme Legends
Ecco the Dolphin: Defender of the Future
Enter the Matrix
Eternal Quest
Eternal Ring
Everblue 2
Everybody's Golf
Eyetoy: Play
Eyetoy: Play 2
Fahrenheit
Fantavision
Fatal Fury Battle Archives Vol. 1
Final Fantasy X
Final Fantasy X-2
Final Fantasy XII
Flipnic
Frequency
Fur Fighters: Viggo's Revenge
Futurama
Galerians: Ash
The Getaway
God Hand
God of War
God of War 2
Goldeneye: Rogue Agent
Gran Turismo 3: A-Spec
Gran Turismo Concept 2002 Tokyo-Geneva
Gran Turismo 4: Prologue
Gran Turismo 4
Grand Theft Auto 3
Grand Theft Auto: Vice City
Grand Theft Auto: San Andreas
Grandia 2
Guilty Gear X2
Guilty Gear Isuka
Guitar Hero
Guitar Hero 2
Guitar Hero Encore: Rocks the 80s
Guitar Hero 3: Legends of Rock
Half Life
Headhunter
Hitman: Contracts
Hyper Streetfigher 2
ICO
Intellivision Lives
Jak and Daxter: Precursor Legacy
Jak 2: Renegade
Jak 3
Jak X
Killer 7
Killzone
King of Fighters Collection: The Orochi Saga
King of Fighters: 2000-2001
King of Fighters 2002
King of Fighters 2003
King of Fighters XI
King of Fighters Neowave
King of Fighters: Maximum Impact
King of Fighters: Maximum Impact 2
Kingdom Hearts
Kingdom Hearts 2
Lara Croft Tomb Raider: Angel of Darkness
Lara Croft Tomb Raider: Anniversary
Lego Star Wars
The Lord of the Rings: The Fellowship of the Ring
The Lord of the Rings: The Two Towers
The Lord of the Rings: The Return of the King
Maken Shao: Demon Sword
Manhunt
The Matrix: Path of Neo
Max Payne
Megaman X7
Megaman X8
Metal Gear Solid 2: Sons of Liberty
Metal Gear Solid 2: Substance
Metal Gear Solid 3: Snake Eater
Metal Gear Solid 3: Subsistence
Midway Arcade Treasures
Midway Arcade Treasures 2
Midway Arcade Treasures 3
Monster Hunter
Mortal Kombat: Deadly Alliance
Mortal Kombat Deception
Mortal Kombat Armageddon
Mortal Kombat: Shaolin Monks
Music 3000
Myst 3: Exile
Namco Museum 50th Anniversary
Need for Speed Underground
Need for Speed Underground 2
Odin Sphere
Okami
Oni
Onimusha: Warlords
Onimusha 2: Samurai's Destiny
OutRun 2006: Coast 2 Coast
Parappa the Rapper 2
Persona 3 FES
Persona 4
Prince of Persia: The Sands of Time
Prince of Persia Warrior Within
Prince of Persia: The Two Thrones
Pro Evolution Soccer 4
Project Zero
Project Zero 3: The Tormented
Psyvariar: Complete Edition
Quake 3 Revolution
R-Type Final
Ratchet and Clank
Ratchet and Clank 2: Locked and Loaded
Ratchet and Clank 3
Ratchet: Gladiator
Rayman 3: Hoodlum Havoc
Rayman M
Red Faction
Resident Evil: Code Veronica X
Resident Evil Outbreak
Rez
Ridge Racer 5
Rogue Galaxy
Samurai Shodown V
Sega Classics Collection
Sega Mega Drive Collection
Sega Superstars
Shadow Hearts Covenant
Shadow of Rome
Shadow of the Colossus
Shin Megami Tensei: Digital Devil Saga
Shin Megami Tensei: Digital Devil Saga 2
Silent Hill 2
Silent Hill 3
Silent Hill 4: The Room
Sly Raccoon
Sly 2: Band of Thieves
Sly 3: Honour Among Thieves
SNK Arcade Classics Volume 1
SNK vs Capcom: SVC Chaos
Soldier of Fortune: Gold Edition
Sonic Riders: Zero Graviy
Sonic Mega Collection +
Soul Calibur 3
Soul Reaver 2
Spider-Man 2
Spyro: Enter the Dragonfly
Spyro: A Hero's Tail
The Legend of Spyro: The Eternal Night
SSX 3
Star Ocean: Till the End of Time
Star Trek Voyager: Elite Force
Star Wars: Jedi Starfighter
Street Fighter Alpha Anthology
Streetfighter EX3
Suikoden IV
Suikoden V
The Summoner
Summoner 2
Syphon Filter: The Omega Strain
Taito Legends
Taito Legends 2
Tekken Tag Tournament
Tekken 4
Tekken 5
Time Crisis II
Time Crisis 3
Timesplitters: Future Perfect
TOCA Race Driver
TOCA Race Driver 3
Tom Clancy's Ghost Recon
Tom Clancy's Splinter Cell
Tom Clancy's Splinter Cell: Pandora Tomorrow
Tony Hawk's Pro Skater 3
Tony Hawk's Underground 2
Unlimited Saga
Unreal Tournament
Valkyrie Profile 2: Silmeria
Viewtiful Joe 2
Virtua Cop: Extreme Edition
Virtua Fighter 4: Evolution
Virtua Tennis 2
We Love Katamari
Wild Arms 3
Wipeout Fusion
World Heroes Anthology
Worms 3D
Worms 4: Mayhem
Worms Blast
Worms Forts: Under Siege
WWE Smackdown! Shut Your Mouth
WWE Smackdown! Here Comes the Pain
Xenosaga: Episode 2
Yakuza
Yakuza 2
Ys: The Ark of Napishtim
Zone of the Enders
Any and all suggestions are welcome, please don't be put off if my replies are almost exclusively 'got it in Xbox/GC/PSP/360/etc.'