I highly doubt I can remember every one, but we'll see.

Tales of Phantasia (SNES/PSX/GBA)
Tales of Destiny (PSX)
Tales of Eternia (PSX)
Tales of Symphonia (GCN/PS2)
Tales of Phantasia: Narikiri Dungeon (GBC)
Tales of the World: Narikiri Dungeon 2 (GBA)
Tales of the World: Narikiri Dungeon 3 (GBA)
Genso Suikoden (PSX)
Genso Suikoden II (PSX)
Genso Suikoden III (PS2)
Genso Suikoden IV (PS2)
Genso Suikoden:Card Stories (GBA)
Genso Suikogaiden Vol. 1 (PSX)
Genso Suikogaiden Vol. 2 (PSX)
Final Fantasy (NES/WSC/PSX/GBA)
Final Fantasy II (NES/WSC/PSX/GBA)
Final Fantasy III (NES)
Final Fantasy IV (SNES/PSX)
Final Fantasy Mystic Quest (SNES)
Final Fantasy V (SNES/PSX)
Final Fantasy VI (SNES/PSX)
Final Fantasy VII (PSX/PC)
Final Fantasy VIII (PSX/PC)
Final Fantasy IX (PSX)
Final Fantasy X (PS2)
Final Fantasy X-2 (PS2)
Final Fantasy XI (PC/PS2)
Final Fantasy Tactics (PSX)
Final Fantasy Tactics Advance (GBA)
Final Fantasy Adventure/Seiken Densetsu: Final Fantasy Gaiden/Sword of Mana (GB/GBA)
Seiken Densetsu 2/Secret of Mana (SNES)
Seiken Densetsu 3 (SNES)
Seiken Densetsu: Legend of Mana (PSX)
Breath of Fire (SNES/GBA)
Breath of Fire II (SNES/GBA)
Breath of Fire III (PSX)
Breath of Fire IV (PSX)
Final Fantasy Legend/Makaitoushi SaGa (GB)
Final Fantasy Legend II/SaGa 2 (GB)
Final Fantasy Legend III/SaGa 3 (GB)
Romancing SaGa (SNES)
Romancing SaGa 3 (SNES)
SaGa Frontier (PSX)
SaGa Frontier 2 (PSX)
Unlimited SaGa (PS2)
Fantastic Space Odyssey Star Ocean (SNES)
Star Ocean 2: The Second Story (PSX)
Star Ocean 3: Till the End of Time (PS2)
Valkyrie Profile (PSX)
Radiata Stories (PS2)
Growlanser II (PSX/PS2)
Growlanser III (PSX/PS2)
Disgaea: Hour of Darkness (PS2)
La Pucelle: Tactics (PS2)
Phantom Brave (PS2)
Makai Kingdom (PS2)
.hack//Infection (PS2)
.hack//Mutation (PS2)
.hack//Outbreak (PS2)
.hack//Quarantine (PS2)
Hoshigami: Ruining Blue Earth (PSX)
Lunar: Silver Star Story "Complete" (SCD/PSX)
Lunar II: Eternal Blue "Complete" (SCD/PSX)
Secret of Evermore (SNES)
Bahamut Lagoon (SNES)
Super Mario RPG (SNES)
Paper Mario (N64)
Paper Mario: The Thousand-Year Door (GCN)
Mario & Luigi: Superstar Saga (GBA)
Vagrant Story (PSX) [Action RPG]
Shadow Hearts (PS2)
Grandia II (PS2)
Grandia Xtreme (PS2)
Riviera: The Promised Land (GBA)
Great Greed (GB)
Phantasy Star 2 (Genesis)
Fire Emblem (NES)
Fire Emblem II (NES)
Fire Emblem III (SNES)
Fire Emblem VII (GBA)
Fire Emblem VIII (GBA)
Crystalis (NES/GBC)
Chrono Trigger (SNES/PSX)
Chrono Cross (PSX)
Legend of Dragoon (PSX)
Pokémon Blue (GB)
Pokémon Red (GB)
Pokémon Yellow (GB)
Pokémon Gold (GBC)
Pokémon Silver (GBC)
Pokémon Sapphire (GBA)
Pokémon Leaf Green (GBA)
Pokémon The Card Game (GBC)
Golden Sun (GBA)
Golden Sun II (GBA)
Tactics Ogre: The Knight of Lodus (GBA)
Ogre Battle (SNES)
Ogre Battle 64 (N64)
Vandal Hearts (PSX)
Dragon Warrior/Quest (NES)
Dragon Warrior/Quest II (NES)
Dragon Warrior/Quest III (NES)
Dragon Warrior/Quest IV (NES)
Dragon Quest V (SNES)
Dragon Quest VI (SNES)
Dragon Warrior/Quest VII (PSX)
Kingdom Hearts (PS2)
Kingdom Hearts: Chain of Memories (GBA)
Wild Arms (PSX)
Wild Arms II (PSX)
Wild Arms III (PS2)
Xenogears (PSX)
Xenosaga (PS2)
Xenosaga II (PS2)
Threads of Fate (PSX)
Live a Live (SNES)
Lufia And the Fortress of Doom (SNES)
Lufia II: Rise of the Sinistrals (SNES)
Thousand Arms (PSX)


Also, I didn't include the Legend of Zelda series, despite the fact I feel they're RPGs.