Well, it all depends on your tastes.
■Turn based RPG :
- PS1: Suikoden 1/2, Lunar (2 parts, remake of SEGA CD versions), Jade Cocoon/The Story of Tamamayu, Saga Frontier 1/2
- SNES/Super Famicom (SFC): Final Fantasy 4/5/6, Chrono Trigger, Far East of Eden Zero, Live A Live, Shin Megami Tensei 1/2/If
- NEC PC ENGINE : Tengai Makyou Ziria
■Tactical RPG/Strategy :
- PS1: Final Fantasy Tactics, Kartia, Hoshigami, Vandal Hearts 1/2, Front Mission Second & 3, Arc the Lad 1/2/3
- SNES/SFC: Front Mission, Tactics Ogre, Ogre Battle, Super Robot Taisen 3 & 4 & EX & Gaiden, Little Master, Fire Emblem (3 parts), Der Langrisser
- GBA: Advance Wars 1/2, Final Fantasy Tactics Advance, Tactics Ogre The Knight of Lodis, Fire Emblem (3 parts), Onimusha Tactics
- GENESIS/Megadrive: Shining Force 1/2, Warsong/Langrisser & Langrisser 2, Dune 2
- SEGA SATURN : Shining Force 3
■Action RPG:
PS1: Grandia, Alundra 1/2
SNES: Secret of Mana, Trials of Mana, Alcahest, Illusion of Time
GENESIS: Crusader of Centy/Soleil, Beyond Oasis/The Legend of Thor, Landstalker, Light Crusader
■Adventure :
PS1 : Discworld 1/2/Noir, Blazing Dragons, Policenauts, Broken Sword 1/2
SEGA CD : Snatcher
■FPS :
PS1: DOOM, Final DOOM, Quake 2, Duke Nukem Total Meltdown, Star Wars Dark Forces
GBA: DOOM 1/2, Dark Arena, Duke Nukem Advance, Serious Sam
N64: DOOM 64, Turok 1/2/3/Rage Wars, Quake 1/2, Duke Nukem 64, GoldenEye
■Shoot'em Up (shmup) :
DREAMCAST: GunBird 2, Zero Gunner 2, Giga Wing 1/2, Ikaruga, Under Defeat, REZ
- PS1: DoDonPachi, DonPachi, Strikers 1945 1 & 2, Sonic Wings Special, RayStorm, RayCrisis, GunBird, Detana Twin Bee Yahho!, Raiden DX, Soukyuu Gurentai, Parodius series (same as SFC and Sexy Parodius), Darius Gaiden & G-Darius, Thunderforce 5, Time Bokan Series (2 parts)
- SNES/SFC: Axelay, UN Squadron/Area 88, Space Megaforce/Super Aleste, Parodius, Gokujou Parodius, Jikkyou Oshaberi Parodius, Macross Scrambled Valkyrie, Pocky & Rocky 1/2, Super SWIV/Firepower 2000, Pop'n Twinbee
- NEC PC ENGINE/Turbographix 16 (HUcard & CD Rom): GunHED/Blazing Lazer, Soldier Blade, Super Star Soldier, Final Soldier, Seirei Senshi Spriggan & Spriggan Mark 2, Lords of Thunder, Gate of Thunder, 1941, Sylphia, PC Denjin, CD Denjin, Star Parodier, Sapphire, Summer Carnival '92 Alzadick & '93 NEXZR Special
- GENESIS: Gley Lancer, Musha Aleste, Tatsujin, Thunderforce 3/4 Twinkle Tale, Undead Line, View Point
- SEGA CD/MEGA CD: Bari Arm, Dennin Aleste/Robo Aleste, Keio Flying Squadron
- NEO GEO: Blazing Stars, Strikers 1945 +, Pulstar, Last Resort, View Point, Sonic Wings 2/3
- NES: Isolated Warrior, Crisis Force, Gun Nac
■Platformer/Action Plateformer/Run & Gun :
- SNES/SFC: Contra 3/Contra Spirits/Super Probotector, Skyblazer, Mister Nutz, Magical Quest, Demon's Crest/Demon's Blazon, Hagane, Run Saber, Super Turrican 1/2, Ganbare Goemon 2/3/4, Donkey Kong Country 1/2/3, Actraiser
- GENESIS: Gunstar Heroes, Contra Hard Corps, Castlevania Bloodlines, Turrican & Mega Turrican, Strider
- PS1: Strider 2, Pandemonium 1/2, Metal Slug & Metal Slug X
- NES : Bio Miracle Bokutte Upa, Shadow of the Ninja/Blue Shadow
■Other :
- SNES : Sim City, Super Bomberman 1/2/3/4/5