Since several of my fellow RPG Temple members are doing this today, I thought I would join in. I've completed 129 games in total, with 87 of them being RPGs. Some may argue games like Harvest Moon aren't RPGs, but since RPGamer says they are, I shall list them as well.

GB/GBC [8]
Harvest Moon GBC
Harvest Moon 2 GBC
Pokemon Blue
Pokemon Red
Pokemon Yellow
Pokemon Gold
Pokemon Silver
Pokemon Crystal

GBA [13]
Final Fantasy Tactics Advance
Fire Emblem
Fire Emblem: The Sacred Stones
Harvest Moon: Friends of Mineral Town
Harvest Moon: More Friends of Mineral Town
Lunar Legend
Pokemon Emerald
Pokemon FireRed
Pokemon LeafGreen
Pokemon Ruby
Pokemon Sapphire
Shining Force: Resurrection of the Dark Dragon
Summon Night: Swordcraft Story

NDS [13]
Disgaea DS
Final Fantasy Tactics A2: Grimoire of the Rift
Fire Emblem: Shadow Dragon
Harvest Moon DS
Harvest Moon: Island of Happiness
Hoshigami: Ruining Bue Earth Remix
Luminous Arc
Luminous Arc 2
Pokemon Diamond
Pokemon Pearl
Rhapsody: A Musical Adventure
Suikoden Tierkreis
Summon Night: Twin Age

N64 [4]
Harvest Moon 64
Paper Mario
Pokemon Stadium
Pokemon Stadium 2

GCN [5]
Fire Emblem: Path of Radiance
Harvest Moon: A Wonderful Life
Harvest Moon: Another Wonderful Life
Harvest Moon: Magical Melody
Pokemon Colosseum

Wii [1]
Fire Emblem: Radiant Dawn

PSP [5]
Astonishia Story
Disgaea: Afternoon of Darkness
Final Fantasy Tactics: War of the Lions
Generation of Chaos
The Legend of Heroes: A Tear of Vermillion

PS1 [8]
Final Fantasy Tactics
Lunar: SIlver Star Story Complete
Lunar 2: Eternal Blue Complete
Rhapsody: A Musical Adventure
Suikoden
Suikoden II
Thousand Arms
Threads of Fate

PS2 [23]
.hack//Infection
Ar Tonelico: Melody of Elemia
Atelier Iris: Eternal Mana
Atelier Iris 2: The Azoth of Destiny
Atelier Iris 3: Grand Phantasm
Dark Cloud 2
Disgaea: Hour of Darkness
Disgaea 2: Cursed Memories
Final Fantasy XII
GrimGrimoire
Growlanser Generations
Harvest Moon: A Wonderful Life
Harvest Moon: Save the Homeland
La Pucelle: Tactics
Makai Kingdom: Chronicles of the Sacred Tome
Phantom Brave
Rogue Galaxy
Star Ocean: Till the End of Time
Suikoden III
Suikoden IV
Suikoden V
Suikoden Tactics
Ys: The Ark of Napishtim

PS3 [2]
Disgaea 3: Absence of Justice
Valkyria Chronicles

360 [5]
Enchanted Arms
Eternal Sonata
Fable II
Phantasy Star Universe
Star Ocean: The Last Hope

And I thought I never really beat that many games. My list can actually compete with those of the other Temple members. =O