That's the last time I answer this, but let's go:

The Holy Trinity:

1 - Ocarina Of Time
2 - Super Mario World
3 - Super Metroid

The rest of them, in no particular order:

Zelda A link to the past
Super Mario Bros 3
Mother 3
Paper Mario
Yoshi's Island
GTA Vice City
Chrono Trigger
Many, many more...

1. The Legend of Zelda: Ocarina of Time

2. Final Fantasy VI

3. The Legend of Zelda: Majora's Mask

4. The Legend of Zelda: The Wind Waker

5. Metal Gear Solid 3

6. Metal Gear Solid 4

7. Super Mario Galaxy 2

8. Super Mario Galaxy 

9. Fallout 3

10. Resident Evil 4

1. Galaga
2. NiGHTS
3. Shenmue
4. Panzer Dragoon Saga
5. Halo:CE
6. Metroid Prime
7. REmake
8. RE 4
9. Sim City 4
10. Shining Force 3

1. Final Fantasy VIII
2. Heavy Rain
3. Legend of Zelda: A Link to the Past
4. Super Mario Bros. 3
5. Metal Gear Solid 4
6. Tetris
7. Mario 64
8. Mechwarrior 4
9. Fallout 3
10. Half Life 2

From an objective critical viewpoint:

1. Mario Galaxy 2

2. Resident Evil 4

3. Mario Galaxy

4. Mario Bros. 3

5. Bioshock

6. Zelda: Ocarina of Time

7. Half Life 2

8. Banjo Kazooie

9. Donkey Kong Country 2

10. Soul Calibur

My personal favourites:

1. Resident Evil 4

2. Mario Galaxy 2

3. Mario Galaxy

4. Starfox (SNES)

5. Starfox 2 (SNES)

6. Dead Space

7. NiGHTS into Dreams

8. Gears of War 2

9. Sin and Punishment 2

10. F Zero GX

1) Metal Gear Solid 4: Guns of the Patriots (No.1 Deserves it's Boxart to be shown)

2) Kingdom Hearts 2

3) Crash Bandicoot 3: Warped

4) Metal Gear Solid 3: Snake Eater

5) Final Fantasy X

6) Metal Gear Solid

7) Uncharted 2: Among Thieves

8) Final Fantasy VII

9) God of War III

10) Ratchet and Clank: Up Your Arsenal

My top 25 is on my profile, so that came in handy =) Here's a copy and paste of my top 10:

1. The World Ends With You (DS)
2. Soul Calibur 3 (PS2)
3. Uncharted 2: Among Thieves (PS3)
4. Kingdom Hearts 2 (PS2)
5. Crash Bandicoot 3: Warped (PS1)
6. Gran Turismo 3: A-Spec (PS2)
7. Tekken 3 (PS1)
8. Crash Team Racing (PS1)
9. Need For Speed: Most Wanted (PS2)
10. LittleBigPlanet (PS3)

1. Starcraft
2. Planecape torment
3. Quake 3
4. Fallout 2
5. halo 3
6. knights of the old republic
7. Deus Ex
8. System Shock 2
9. Super Mario 64
10. Doom

Mine :D

1. Civlization: le original (PC) - AWESOME GAME, when i was in history and i heard chariot i thought back to it lol, and only 4mb lol... siv V better be good -.- or im coming for you sid
2. Street Fighter IV (PC)- So much fun, endless hours of entertainment
3. Sonic (Sega Mega Drive): le original - It's sonic... sonic IV better be good
4. Rescue Rover (PC) - Played it on the Pc with one of the 5.34" discs you know the big ones, lots of fun
5. Age of Empires: le original (PC) - the first thing i thought, wow this is civilization.. but the people are moving o.0
6. FFIX (PS2) - I liked it as it was my original one, i have played and finished all the ones that have been released in Australia
7. Crash Bandicoot 2: Cortex Strikes Back (ps2) - The first one i played and in my opinion along with warped are much better then the original.
8. Boloball (pc) - play it before you criticise
9. Kings Quest V (PC) - Very Cool Game
10. Kotor (PC) - Awesome fun

1. FFX
2. Persona 4
3. Kingdom Hearts II
4. Grandia
5. FFX-2
6. Kingdom Hearts
7. Warcraft III
8. Super Mario Kart
9. Super Mario World
10. Pokemon Silver

Would probably change if I wrote one again in a week though