Easy enough. From my (outdated) top 50 game list. PS2 was a powerhouse with 10 games in my top 20! Take out Dynasty Warriors, Romance of the Three Kingdoms, and Final Fantasy for Star Ocean til the end of time, Dragon Quest VIII and God of War for one per franchise.


18: Romance of the Three Kingdoms VIII PS2

16: Kingdom Hearts PS2

14: Dynasty Warriors 4 PS2
13: Kessen 2 PS2
12: Dynasty Tactics 2 PS2
11: Disgaea PS2

9: Final Fantasy XII PS2

6: Romance of the Three Kingdoms IX PS2
5: Dynasty Warriors 3 PS2

2: Final Fantasy X PS2

In no particular order

1. Final Fantasy X
2. Kingdom Hearts I
3. Kingdom Hearts II
4. Star Ocean Till the End of Time
5. Disgaea Hour of Darkness
6. Grand Theft Auto San Andreas
7. God of War II
8. Shadow of the Colossus (only played PS3 ver)
9. Ratchet & Clank Up Your Arsenal (only played the PS3 ver)
10. Sly 2 Band of Thieves (only played the PS3 ver)

I think at this point I played more remasters of PS2 games on systems outside of the PS2 lol.

I've only played so many PS2 games, so have put on the list what I've got:

1. Okami
2. Ratchet & Clank 2
3. Escape from Monkey Island (I love the series and this isn't as bad as they say)
4. Robot Warlords
5. Tekken 5
6. Ninja Assault
7. Gun
8. Ico (I've only played beginning)
9. GTA: San Andreas (I've only played beginning)
10. 007: From Russia with Love (I've only played beginning)

In order:
1. Shadow of the Colossus
2. Final Fantasy X
3. Metal Gear Solid 3
4. Persona 4
5. Okami
6. Final Fantasy XII
7. Kingdom Hearts II
8. Star Ocean: Till the End of Time
9. Tekken 5
10. Soul Calibur III

No silmeria or DX VIII, crazy. The zenosaga games should also be mentioned.

In no particular order

1. Final Fantasy 12
2. Suikoden 5
3. Suikoden 3
4. Okami
5. Metal Gear Solid 3 Snake Eater
6. Grand Theft Auto Vice City
7. God of War II
8. Shadow of the Colossus
9. Dragon Quest 8
10. Soul Calibur 3

Honorary mentions: FF10, Ratchet and Clank up your arsenal, Grand Turismo 3

My favorite on PS2 Era :

Trapt
Clock Tower 3
Resident Evil 4
Final Fantasy X & X-2 & XII
Star Ocean 3
Broken Sword 3
Gran Turismo 3 & 4 

Ico

Shadow of the Colossus

I don't think I've played enough PS2 games to be able to name 10 worthy ones, but let's see:

1. Final Fantasy X
2. Metal Gear Solid 2
3. Metal Gear Solid 3
4. Final Fantasy XII
5. Ratchet & Clank 2
6. Ico
7. Ratchet & Clank 3
8. Dynasty Warriors 5
9. Ratchet & Clank
10. Jak and Daxter: The Precursor Legacy

Some of these I've only/mostly played as remasters on PS3, but I think they count anyway. Yeah, I've missed a ton of great games, I'm sure. I guess that's barely 10 games worthy of 'enough' praise, and it's only the top 3 that I really consider absolute top tier. Depending on how I feel and how exactly the question is phrased, Final Fantasy X and Metal Gear Solid 2 might also switch places, because I have a really hard time deciding which one I like more.