Damn, this will be tough.


Single player:

- The Legend of Zelda: Ocarina of Time
- Halo: CE
- Super Mario 64
- Metroid Prime 2
- Skyrim

(I mainly wanted some franchise variety up there. And they may not necessarily be in order as they all have their ups and downs.)

Multiplayer:

- Mario Kart 64
- Super Smash Bros Melee
- Halo 3
- Goldeneye
- Diddy Kong Racing

Single-player

1. Metroid Prime
2. Zelda MajorasMask
3. Super Mario 64
4. Resident evil remake
5. Donkey Kong country

Multiplayer

1. Mario kart
2. Smash bros
3. Perfect dark
4. F-Zero
5. King of fighters

I'm surprised how there is so little God of War 3, Halo Reach, Red Dead, and Uncharted 3. Those were probably the most loved games I had thought to be by this site.

Single Player

1) Uncharted 3
2) Rayman Origins
3) Resident Evil 4
4) Ninja Gaiden Sigma Plus
5) Skyrim

Multiplayer

1) Age of Mythology
2) Uncharted 3
3) Need for Speed - Hot Pursuit
4) Resistance 2
5) Mario Kart Wii

wow thats a pretty big thing to state :D i guess this is a must buy then! 

Single Player:

1. Zelda Wind Waker
2. Final Fantasy VI
3. Super Mario Galaxy 2
4. Chrono Trigger
5. Xenoblade Chronicles


Multiplayer:

1. All Pokemon RPGs
2. Age of Empires II
3. Super Smash Bros Brawl
4. Mario Kart 7
5. LBP

Single player:
1.FFX
2.FF8
3.Bioshock
4.Uncharted 2
5.Legend of Zelda OOT

Multiplayer:
1.Uncharted 2
2.Uncharted 3
3.Halo 2
4.Halo 3
5.SSBM

Off the top of my head....

Best SP =
1. Uncharted 3
2. Metal Gear Solid 4
3. Uncharted 2
4. God of War III
5. Journey

Honourable Mention: Killzone 3 & Killzone 2

Best MP =

1. Uncharted 3
2. Killzone 2
3. LittleBigPlanet 2 & 1
4. Metal Gear Online (r.i.p)
5. Uncharted 2

Honourable mention: Starhawk & Warhawk