OutlawAuron's comment in the worst RPG experience thread gave me this thread idea. I guess I'll start. I'm likely to miss few. I've played several.

NES

Dragon Warrior 1-4

Final Fantasy 1 - 3

Faxanadu

Hydlide

Deadly Towers

Castlevania II: Simon's Quest

Zelda II: The Adventure of Link

Crystals

Swords & Serpents

The Magic of Scheherazade

FIre Emblem

Master System

Phantasy Star

Miracle Warriors

Genesis

Phantasy Star 2-4

Shining Force 1-2

Shining in the Darkness

Shadowrun

Landstalker

Beyond Oasis

Exile

SNES

Ogre Battle

Final Fantasy IV-VI

Dragon Quest V-VI

Lufia 1 and 2

Shadowrun

Terranigma

Secret of Mana

Secret of Evermore

Chrono Trigger

7th Saga

Arcana

Breath of Fire 1 and 2

Super Mario RPG

Soul Blazer

Illusion of Gaia

Earthbound

Tales of Phantasia

Lagoon

Inindo: Way of the Ninja

Final Fantasy Mystic Quest

Sega CD

Lunar 1 and 2

Shinging Force CD

Dark Wizard

Saturn

Panzer Dragoon Saga

Shining Force III: Chapter 1 (BTW Fuck you Bernie Stolar. I never got to finish the complete story.)

Shining in the Holy Ark

Shining Wisdom

Albert Odyssey

Dragon Force

Legend of Oasis

Mystaria (I had the original release, I recall it releasing later on under a different name)

Castlevania: Symphonia of the Night (Best friend had the Saturn import with bonus content. PS1 version had superior graphics which was odd. SOTN is 2D)

Playstation

Final Fantasy VII-IX

Final Fantasy Tactics

Grandia

Dragon Warrior VII

Lunar 1 and 2

Wild Arms 1

Tactics Ogre

N64

Ogre Battle 64

Dreamcast

Grandia 2

Skies of Arcadia

Shenmue 1 - 2

Evolution 1-2

Phantasy Star Online (Version 1 and 2)

PS2

Final Fantasy X, X-2, XII

Suikoden III and V

Dragon Quest VIII

Star Ocean: Till The End of Time

Grandia III

Grandia Xtreme

Shining Tears

Gamecube

Fire Emblem: Path of Radiane

Tales of Symphonia

Skies of Arcadia: Legends

Baten Kaitos

Baten Kaitos Origins

Phantasy Star Online (Episode I and II)

Megaman X Command Mission

Gladius

Evolution Worlds

Xbox

Knights of the Old Republic 1 and 2

Jade Empire

Fable

Xbox 360

Enchanted Arms

Mass Effect 1 - 3

Blue Dragon

Lost Odyssey

Tales of Vesperia

Infinite Uniscovery (That name still makes no sense)

Record of Agarest War 1 and Zero

Star Ocean: The Last Hope

The Last Remnant

Eternal Sonata

Oblivion

PS3

Demon's Souls

Valkyria Chronicles

Final Fantasy XIII

Disgaea 3

Wii

Fire Emblem Radiant Dawn

Xenoblade

Tales of Symphonia: Dawn of the New World (I hate Emil Castagnier)

Muramasa: The Demon Blade

Monster Hunter Tri

PC

Jade Empire

Knights of the Old Republic I and II

Mass Effect 1 and 2

Septerra Core: Legacy of the Creator

Vampire The Masquerade

Vampire The Masquerade Redemption

Dragon Age Origins /w Awakening expansion

Dragon Age 2

Deux Ex Human Revolution

The Last Remnant

Torchlight

Diablo III

Borderlands

The Witcher: Enhanced Edition

Breath of Death VII

Chtulu Saves The World

Fallout 1 and 3

Morrowind

Okay I know I missed few and I didn't list portables. Damn I have too many games. I need to hit the lottery so I don't have to work and I can sit and home and play them all day.

No Elder Scrolls or Fallout? You gotta play one of those at lease once... especially Skyrim and Fallout 3.

And I know I'm being nitpicky here, but Zelda II isn't an RPG by any stretch. The only difference in gameplay (aside from the side-scrolling aspect) is that you extend your life/sword/magic with XP instead of collecting heart containers and upgraded items at regular intervals like clearing dungeons in other Zelda games.

I knew missed a few. I owned Morrowind for PC. I own Fallout and Fallout 3 for PC. I own Oblivion for Xbox. Oblivion bored the hell out of me. I liked Morrowind and Fallout 3 was okay. I'll go back an update the list.

@Zero129

When I got half way through my list, I regretted starting this thread. I need to go back and add my Gameboy, Game Gear, GBA, and DS Rpgs.

I'd have no idea where to even start. I don't even know what is an RPG and what isn't anymore. Is Castlevania: Symphony of the Night an RPG? Is Yakuza? Dead Rising? I dunno!

Mass Effect, Oblivion, Fallout 3/NV, Skyrim, Valkyrie Chronicles...really just the mainstream ones, well I guess VC isn't mainstream but the rest are. I don't play those weird ones nobody has heard of outside of VGchartz, that win the best RPG threads as voted by VG members.

Too many to care to list, since a majority of my PS1/PS2 collection are RPGs. Plus, I played a bunch of GBA and SNES ones as well.

Please tell me I listed SOTN. I listed Castlevania II and SOTN took the concept and ran with it.  *checks list* Damn this thread was a bad idea. I'm too senile for this sort of thing.

I played a lot of rpg's in the ps1/2 days and most of them were japanese so its impossible for me to have a complete list and not to mention all the mmo rpg's I've played

I wouldn't consider either an RPG. But I have some pretty old-school RPG definitions.

Hmm, I guess I could try.
Final Fantasy 4-13, Dragon Quest 4-9, Persona 3/4/portable, Digital Devil Saga 1/2, Pokemon All gens, Mass Effect 1-3, Oblivion/Skyrim, Dragon Age 1/2, Unlimited Saga, Suikoden 3-5, Paper Mario 1-3, Mario&Luigi 1-3, Super Mario RPG, Chrono Cross/Trigger, Dark Cloud 1/2, Odin Sphere, Rogue Galaxy, Xenoblade Chronicles, Xenogears, Xenosaga 1-3, Valkyrie Chronicles, Agrest War, Magna Carta, Witcher 2, Sakura Wars, Arc Rise, Arc Tonelico 1-3, Atelier games, Devil Survivor 1-2, Nocturne, Strange Journey, Eternal Sonata, Lost Oddessy, Blue Dragon, Tales of Symphonia, Tales of Innocence, Tales of the Abyss, Tales of Graces, Tales of Vesperia, Grandia 1-3, Secret of Mana, Phantasy Star Online, Final Fantasy Tactics/Advance/Lions, Star Ocean 3-4, Disgaea 1-4, Diablo 3, Borderlands, Infinite Undiscovery, The Last Remnant, Fire Emblem Radiant Dawn, Skies of Arcadia, Tactics Ogre.

All I could think of. I may have played more, but those seem good enough :D