Well this'll take a while, let's see..

Commodore 64: Pitfall
ColecoVision: Smurf Paint 'n' Play Workshop (this one's kind of cheating, it's the only game I've played on ColecoVision
Philips CD-i: Flashback
Atari Lynx: Crystal Mines 2
MSX2: Metal Gear

Sega Master System: Sonic the Hedgehog 2
Mega Drive/Genesis: Phantasy Star 4
Dreamcast: Skies of Arcadia

NES: Mega Man 2
SNES: Secret of Mana
N64: Super Mario 64
Gamecube: Paper Mario: The Thousand-Year Door
Wii: Xenoblade Chronicles
Wii U: Xenoblade Chronicles X (Breath of the Wild came close)
Switch: Zelda: Breath of the Wild (again, kind of cheating, I don't have one but I have played the Switch version of the game at my brother's place)
Gameboy: Pokémon Blue
Gameboy Color: Zelda: Link's Awakening DX
Gameboy Advance: Super Robot Taisen Original Generation 2
DS: Radiant Historia
3DS: Zelda: A Link Between Worlds

Xbox: Halo
Xbox 360: Lost Odyssey

Playstation: Xenogears
Playstation 2: Ar Tonelico 2
Playstation 3: Legend of Heroes: Trails of Cold Steel 2
Playstation Portable: Legend of Heroes: Trails in the Sky FC (First Chapter)
Playstation Vita: Zero no Kiseki - Evolution (probably because I haven't played its sequel yet)
Playstation 4: Yakuza 0, for now. Bound to change at some point.

PC: Legend of Heroes: Trails in the Sky SC (Second Chapter)