Acriz: That's pretty easy. The year that has A Link to the Past and Castlevania 4, the win goes to Japan easily.
But I am not so sure about SimCity here. The SNES version was done by Nintendo, but the game idea is still NA. On the other hand it is this version that introduced me to the city builder genre.
That is a fair point, I moved it down to the multiregional section of the JP list.
Edit:
Went with JP too. My faves this year:
Air Buster - MD (arc port, Kaneko & Inter State)
Amazing Tater/Puzzle Boy II (Kwirk 2) - GB (Atlus)
Arcus Odyssey - X68K/MD (Wolf Team)
Asterix - SMS (Sega CS)
Banishing Racer - GB (Jaleco Entertainment)
Battle Mania/Trouble Shooter - MD (VIC Tokai)
Bonanza Bros - MD (arc port, Sega CS & I.T.L)
Castle of Illusion starring Mickey Mouse - SMS/GG (different from the MD game, Sega R&D 2)
Castlevania II: Belmont's Revenge - GB (Konami)
Cocoron - NES (Takeru)
Crisis Force - NES (Konami)
Crystal Warriors - GG (Sega)
Devil Crash/Dragon's Fury - MD (1990 port, Technosoft)
Dragon's Curse (Wonder Boy III: The Dragon's Trap) - PCE/TG16 (Hudson?)
Final Fantasy Adventure/Mystic Quest/Seiken Densetsu 1 - GB (Square)
Gain Ground - MD (arc port, Sega/Sega CS)
Ganbare Goemon: Sarawareta Ebisumaru! - GB (Konami)
Golden Axe II - MD (Sega CS)
Gradius: The Interstellar Assault/Nemesis 2 - GB (Konami)
Gynoug/Wings of Wor - MD (NCS, Winds & Cube)
Hammerin' Harry/Daiku no Gen-San - NES (arc port w/ some differences, Irem)
Joe & Mac - ARC (Data East)
Magical Chase - PCE (Quest Corporation)
Master of Monsters - MD (ISCO & Opera House)
Mega Man 4 - NES (Capcom)
Mercs - MD (arc port w/ a new mode added and no co-op, Sega CS, originally by Capcom)
Metal Storm - NES (Tamtex)
Ninja Gaiden 3/Ninja Gaiden III - NES (Tecmo)
Ninja Gaiden Shadow - GB (Natsume)
Operation C - GB (Konami)
Outrun 3D - SMS (Sega)
Over Horizon - NES (Pixel)
Parasol Stars: The Story of Bubble Bobble III - PCE/TG16 (Taito)
Parodius (Parodius Da!) - GB (Konami)
QuackShot Starring Donald Duck/Quack Shot - MD (Sega CS)
Rolling Thunder 2 - MD (arc port, Namco)
Seirei Senshi: Spriggan - PCE CD (Compile)
Shatterhand - NES (Natsume)
Shinobi/The GG Shinobi - GG (Sega CS)
Solomon's Club - GB (Graphic Research)
Sonic the Hedgehog - MD (Sega)
Sonic the Hedgehog - SMS (different, Ancient)
Spanky's Quest - SNES (Natsume)
Street Fighter II - ARC (Capcom)
Streets of Rage - MD (Sega CS)
Sunset Riders - ARC (Konami)
Super Castlevania IV/Castlevania 4 - SNES (Konami)
Teenage Mutant Ninja Turtles III: The Manhattan Project/TMNT 3 - NES (Konami)
Teenage Mutant Ninja Turtles IV: Turtles in Time/TMNT: Turtles in Time/TMNT 4 - ARC (Konami)
The King of Dragons - ARC (Capcom)
The Legend of Zelda: A Link to the Past/Zelda 3 - SNES (Nintendo EAD)
The Legend of the Mystical Ninja - SNES (Konami)
Trax - GB (HAL Laboratory)
U-four-ia: The Saga/Ufouria/Hebereke - NES (Sunsoft)
U.N. Squadron/UN Squadron - SNES (Capcom)
Undeadline - MD (some differences, T&E Soft)
Valis III - MD (some differences, Nippon Telenet)
Vice: Project Doom - NES (Aicom)
Warsong/Langrisser - MD (CareerSoft or NCS)
Wonder Boy in Monster World/Monster World 3 (Dynastic Hero on PCE CD - 1993 (Alfa System)) - MD (Westone)
Yume Penguin Monogatari - NES (Konami)
Sim City/SimCity - SNES (1989 port w/ some differences, Nintendo EAD, original by Maxis)
Sports Talk Baseball - MD (Sega CS & Western Technologies (speech))
Buck Rogers: Countdown to Doomsday - MD (DOS port, Strategic Simulations)
Commander Keen Episode IV: Secret of the Oracle - DOS (id Software)
Conquests of the Longbow: The Legend of Robin Hood - DOS (Sierra)
D/Generation - DOS (1992 AMI, Robert Cook/Veda Hlubinka-Cook)
Kingdom Crusade/Legend of Prince Valiant - GB (Sculptured Software)
King's Bounty - MD (DOS port w/ some differences, New World Computing)
Leisure Suit Larry 1 VGA - DOS (Sierra)
Monkey Island 2: LeChuck's Revenge - DOS (Lucasfilm Games)
Ms. Pac-Man - MD/SMS (Innerprise Software MD/Tengen SMS, PM IP by Namco)
NHL Hockey/EA Hockey - MD (Park Place Production Team)
Rampart - MD (arc port, Tengen)
Road Rash - MD (Electronic Arts)
SkiFree - DOS (Chris Pirih)
Space Quest I VGA - DOS (Sierra)
Star Control - MD (Toys for Bob & Accolade)
Starflight - MD (1986 Remake; Binary Systems, Electronic Arts & BlueSky Software)
Trog! - NES (Visual Concepts or Bally/Midway)
Spider-Man/Spider-Man vs. Kingpin - MD (Sega of America (Technopop & Recreational Brainware))
Toejam & Earl - MD (Johnson Voorsanger Productions)
Europe:
Another World/Out of this World - AMI/ST (Delphine Software)
Battle Isle - AMI/DOS (Blue Byte)
Battletoads - GB (different from NES ver., Rare)
James Pond 2: Codename Robocod - AMI/ST/MD (Vectordean & Millennium Interactive)
Lemmings - AMI/DOS/ST etc. (DMA Design)
Lotus 2 - AMI (Magnetic Fields)
Mega lo Mania/Tyrants - AMI/ST (Sensible Software)
Micro Machines - NES (Codemasters)
Pirates! - NES (Rare)
R-Type - GB (Bits Studios, original by Irem)
Scorched Earth - DOS (? Wendell Hicken)
Supaplex - DOS (Think!Ware Development (Philip Jespersen and Michael Stopp))
Super Space Invaders - SMS (The Kremlin & Tiertex)
Turrican 2/Turrican II - AMI/C64/ST etc. (Factor 5)
