Thats a tough, some great ones eve this year.

Metal Gear 3 and 4 without a doubt, especially 3.

Sonic, i enjoyed when i was younger.

Jonah Lomu Rugby for the ps1

And so far im enjoying Res 5 a lot, got a feeling its going to be short though.

Umm okay I'm going to struggle pulling out a "top 5" but these are the 5 games I can think of that 'changed my gaming experience', so to speak.

1. Super Metroid - SNES - Possibly my favourite game of all time.

2. Legend of Zelda: Ocarina of Time - N64 - 

3. Call of Duty 4 - PC - Some of the best online gaming action I've played.

4. Goldeneye 007 - N64 - The best shooting game of my childhood

5. Any Mario/Sonic games 

Im not sure about off all-time.  Not got a good memory but here are some of my favourites:

- Call of Duty: World at War (Xbox 360)
- The Settlers (PC)
- FlyOrDie :p (PC)
- Pro Evo (Xbox 360)

Sorry but couldn't think of a 5th.

My 5, no order...

Goldeneye - Brings back great memories playing multiplayer with friends.
Micro Machines V3 - Another fantastic multiplayer.
Final Fantasy 8 - My first FF, great story.
Gran Turismo 4 - Incredible driving simulator.
GTA: San Andreas - The map is genius, so detailed and worked the mountain in perfectly.

1 Metal gear solid 4 (ps3)
2 jak and daxter: the precurser legacy (ps2)
3 Resistance 2 (ps3)
4 Uncharted drakes fortune (ps3)
5 GTA 4 (ps3)

;)

Yea Battle, i prefer Mgs3 over 4, the bosses on 3 were great to play against. Mgs 4 had better gameplay i think but the cutscenes were far too long for me, fair enough you can put a good story in a game but when your sat there for an hour at times watchin video's, it becomes annoying. 

MY TOP 5

Alex the kidd was legendary (Sega)

MGS4 (ps3)

Championship manager 00/01 (pc) the hours i spent playing this game was RIDICULOUS

GTA San Andreas (ps2)

Fifa 09 (xbox360)

pretty similar to scottys lol

Yeh 'The End' is incredible, eventhough its very easy. I love completing it whith only a tranq gun. Way too many long cut scenes in the new one and the bosses wern't the best. The final part is only good because of the music.

Micro machine-forgot that 1.

call of duty 5 (xbox 360)
need for speed underground 2 (ps2)
smackdown 2 (ps1)
gran turismo 2 (ps1)
pokémon silver (gba) XD

bit lame i know buh they best classic games and cod haha

Tekken 1 ( ps1 )
Tekken 2 ( ps1 )
Tekken 3 ( ps2 )
Tekken 4 ( ps2 )
Tekken 5 ( ps2/3 )

Fifa 09
Resident Evil 5 (Class)
Need 4 speeds

>Tekken 1 ( ps1 )
>Tekken 2 ( ps1 )
>Tekken 3 ( ps2 )
>Tekken 4 ( ps2 )
>Tekken 5 ( ps2/3 )

You a fan of Tekken mate?

PES 08
NBA live 06
Fifa 09
Little Mermaid
NFS carbon

1.Gears Of War 2 (xbox 360)

2.GTA San Andreas(ps2)

3.Res Evil 5 (xbox360)

4.Winning Eleven 2009(xbox360)

5.Left 4 Dead (xbox360)

With all do respect Left For Dead is a pathetic game...

Resident Evil 5 is awesome great co-op mode!

and to the tekken fan, who is your favorite charater?
id go with Yoshimitsu, Kazuya, and Baek as the BEST

Top 5
Metal Gear Solid 2
Final Fantasy 7
Michael Jordan Chaos in the Windy City 
(unbelievable good, kinda like mario brothers)
Super Mario World
Final Fantasy Tactics

yea deadly knight mgs2 is awesome.

you mentioned about resi 5 co-op being awesome personally resistance 2 is the best co-op game ever, its amazing.

not got resi5 tho so cant comment ;)