The order is unimportant past the first four or so:

1. Flower
2. LittleBigPlanet
3. Uncharted: Drake's Fortune
4. Valkyria Chronicles (Have yet to finish...)
5. Rock Band 2
6. Metal Gear Solid 4: Guns of the Patriots
7. Killzone 2
8. Call of Duty 4: Modern Warfare
9. Resistance: Fall of Man
10. Ratchet & Clank Future: Tools of Destruction

1 MGS4
2 Heavenly Sword
3 LBP
4 GTA4
5 Kz2
6 Uncharted
7 SF4
8 GT5P
9 Fifa 09
10 Ninja Gaiden Sigma

1- Metal Gear Solid 4

2- Valkyria Chronicles

3- Uncharted

4- Killzone 2

5- Resistance 2

6- Naruto UNS

7- Ninja Gaiden Sigma

8- Heavenly Sword

9- Resident Evil 5

10- Folklore

MGS4
Killzone 2
Uncharted
LBP
Res Evil 5
GT5 prologue
COD4
Elder Scrolls : Oblivion
Guitar Hero 3
Super Stardust HD

1- Assassin's Creed

2- Killzone 2

3- Prince Of Persia

4- Little Big Planet

5- Grand Theft Auto IV

6- Saint's Row 2

7- Call Of Duty: World At War

8- Valkyria Chronicles

9- Tom Clancy's H.A.W.X.

10- Disgaea 3

Lol, you have Disgaea 3 above MGS4?

1) Metal Gear Solid 4
2) BioShock
3) Killzone 2
4) Uncharted: Drake's Fortune
5) TES IV: Oblivion
6) LittleBigPlanet
7) Call of Duty 4: Modern Warfare
8) Ratchet and Clank Future: Tools of Destruction

Games above this are at least 9/10

9) Unreal Tournament III
10) Prince of Persia
11) Burnout Paradise
12) Soulcalibur IV
13) Resistance 2
14) Battlefield: Bad Company
15) Ghost Recon Advanced Warfighter 2
16) PES 2009

Games above this are at least 8/10

17) Ninja Gaiden Sigma

Games above this are at least 7/10

18) Far Cry 2

Games above this are at least 6/10

EDIT: Shit, I forgot LBP! O_O

EDIT 2: Added some score-type things.

1. Resident Evil 5
2. Killzone 2
3. Metal Gear Solid 4
4. Warhawk
5. Resistance: Fall of Man
6. Resistance 2
7. Naruto: Ultimate Ninja Storm
8. Devil May Cry 4
9. Street Fighter 4
10. ---