Lol I thought the same thing when I read that.

But if I think about, after playing DS for quite a long time now it is actually quite easy. (at least for me) It was hard initially though.

1. Uncharted 2
2. MGS4
3. Oblivion
4. Fallout 3
5. Killzone 2
6. Call of Duty 4
7. Heavy Rain
8. Uncharted
9. Resistance 2
10. Gran Turismo 5 Prologue

A lot of hours of practice, patience and being careful can take you a long way in Demon's Souls. In fact, I consider it easier after a while. But those virtues take you nowhere in Wipeout :P.

Demon's Souls is not too hard, but it is PUNISHING.

Now, Wipeout or Ninja Gaiden Sigma, those are difficult.

10) Resistance 2
9) Bioshock 2
8) Ratchet and Clank: Quest for Booty
7) Uncharted: Drakes Fortune
6) God of War Collection
5) Resistance: Fall of Man
4) Assassin's Creed 2
3) Ratchet and Clank: Tools of Destruction
2) Uncharted 2
1) Ratchet and Clank: A Crack in Time
0) MNR ;)

Note: These are only out of the games I own.

10 Golden Compass
9 Iron Man
8 Iron Man 2
7 Eye Pet
6 Cooking Mama (When the Ps3 version comes out)
5 Lair
4 Transformers 2 Revenge of the Fallen
3 GTA 4
2 GTA 4
1 GTA 4

1. God of War 3

2. MGS4

3. Uncharted 2

4. little BIG Planet

5. Eternal Sonata

6. Naruto Ultimate Ninja Storm

7. Infamous

8. Final Fantasy XIII

9. Demon's souls

10.Valkyria Chronicles

1. Metal Gear Solid 4: Guns of the Patriots, Uncharted 2: Among Thieves, God of War 3
4. Red Dead Redemption
5. Heavy Rain
6. Uncharted: Drake's Fortune
7. Bioshock
8. Little Big Planet
9. Fallout 3
10. Killzone 2
The list isn't definitive. 1-3 are my top 3. The other seven are all about equal and move around. Red Dead is fresh in my mind so might be lower but it has absolutely blown me away.

1. Uncharted 2 "Among thieves"
2. God of War 3
3. Uncharted "Drake's Fortune"
4. inFAMOUS
5. Heavy Rain
6. Metal Gear Solid IV "guns of the patriot"
7. God of War collection
8. Demons Souls
9. LittleBigPlanet
10. Killzone 2

1. Uncharted 2
2. R&C crack in time
3. Uncharted 1
4. R&C tools of destruction
5. God of war 3
6. Assassin creed 2
7. LBP
8. Mlb 10 the show
9. infamous
10. killzone 2

Ah it is certainly difficult to come up with a list as I don't even know if I have really liked ten ps3 games out of the 21 I own. Forcing things, the list is as follows:

1. Killzone 2 (stellar experience, a really great game).
2. Pro Evolution Soccer 2009 ( really good game, though online is completely broken).
3. Dragon Age Origins ( graphics and combat suck, but the story is very absorbing).
4. Red Faction Guerilla ( pretty fun to destroy everything).

5. God of War III ( impressive scale)

6. Uncharted 2 ( really impressive tech and characters).
7. Demos Souls ( very interesting gameplay mechanics, though I hate the depressing atmosphere).
8. Assassins Creed 2 ( pretty nice game, but turns repetitive).
9. Red Dead Redemption ( haven`t played much, but it's definitely a good game).
10. Heavy Rain ( somewhat boring, but the narrative and characters are incredible).

As for the rest of my games, I thought they were a complete waste of money =(, MGS4, VC and FFXIII were the biggest disappointments.