since you dont ask on which Playstation, i'll just list them all. For PSX -Metal Gear Solid -Metal Gear Solid: VR Mission -Parasite Eve -Parasite Eve 2 -Final Fantasy 8 -Dino Crisis -Dino Crisis 2 -Silent Hill -Resident Evil -Resident Evil 2 -Resident Evil 3: Nemesis -Digimon World 2 -Digimon World 3 -Digimon Card Battle -Medievil -Medievil 2 -Red Alert -Red Alert Retaliation For PS2 -Metal Gear Solid 2: Son of Liberty -Metal Gear Solid 3: Snake Eater -Devil May Cry -Devil May Cry 2 -Devil May Cry 3 -Final Fantasy X -Final Fantasy X-2 -Silent Hill 2 -Silent Hill 3 -Sileht Hill 4: The Room -Resident Evil Code X: Veronica -Zone of the Enders -Zone of the Enders: The 2nd Runner -Dot Hack Vol1: Infection -Dot Hack Vol2: Mutation -Dot Hack Vol3: Outbreak -Dot Hack Vol4: Quarantine -Atelier Iris: Eternal Mana -Atelier Iris 2: The Azoth of Destiny -Atelier Iris 3: Grand Phantasm -Taiko no Tatsujin 5 -Taiko no Tatsujin 6 -Taiko no Tatsujin 7 -Taiko no Tatsujin: Anime Special -Mad Maestro! -TrapT -Hunting Ground -Dragon Ball Z Budokai -The Sim 2 -The Sim: Busting Out -God of War -God of War 2 -Monster Hunter For PSP -Metal Gear Solid: Portable Ops -Metal Gear Solid: Portable Ops Plus -Metal Gear Ac!d -Metal Gear Ac!d 2 -Silent Hill: Origin -Taiko no Tatsujin Portable -Taiko no Tatsujin Portable 2 -God of War: Chain of Olympus -Monster Hunter Freedom 2 -Monster Hunter Freedom Unite -Patapon -Patapon 2 For PS3 -Metal Gear Solid 4 -Devil May Cry 4 -Little Big Planet -Silent Hill: Homecoming -Dead Space -Red Alert 3 -Flowers -Noby Noby Boy -Cross Edge -Ghostbusters: The Video Game (soon)
Digimon World (1) is my personal favorite. I can't find the same enjoyment this game has from any other games I've played. Sure, there are bunch of greater PSX RPG and FPS titles, but their sequels or other titles from later consoles provides similar to better enjoyment in gameplay.
For PSX I'd suggest Koudelka, Legend of Dragoon, Thousand Arms, and Final Fantasy Tactics. All lengthy games with good gameplay, decent stories, good characters, and great music. As for Ps2 I'd suggest the ENTIRE Ratchet and Clank series(besides Size matters, terrible port). As for the series, they're very funny, an absolute blast, great music, and awesome characters. Not to mention awesome weapons. Great thing is, they're all very cheap and very easy to find(atleast around here anyway). Up your arsenal also has some Deathmatch and such multiplayer, while Deadlocked has the same deal with the addition of Co-op play. Another title I'd suggest is Final Fantasy 12. Despite not having the best story nor characters(although I did like Ashe and Basch). Badass gameplay, VERY long and huge amounts of sidequests. Exploration is nice too and then there is the fact of so much equipment and styles for characters to go through. I also like the music pretty good.
PSP: Disgea ,God of War and FF Crisis Core PS1: FF VII ,Silent Hill 2 ,Metal Gear Solid Ps2: God of Wars ,FFs and MGS's Ps3: MGS4 ,LBP and Killzone 2
PS1 Digimon world 1 and 2 Mega Man Legends 1 and 2 and Grandia PS2 Shadow hearts 2 gets my highest recommendation ps3 Resistence 2 Rock band 2 and MGS 4
PS1 - Final Fantasy VII & VIII - Star Ocean - Tales of Destiny - Tactics Ogre PS2 ( I Have TONS of them...but I just list what I remember.. ) - Final Fantasy X/X-2/XII - Shadow Hearts I/II/III - Kingdom Hearts I/II/Final Mix - Shin Megami Tensei P3/FES/P4 - Ar Tonelico I/II PS3 - Final Fantasy XIII - Elder Scrolls IV: Oblivion, The - Valkyria Chronicles - Sacred 2: Fallen Angel
Im myself am a final fantasy fanboy as many others are here, so i wont mention that. Instead i like to mention one game that deserves to at least be in the top 10 playstation games. Street Fighter Alpha 3, probably the best street fighter game on the playstation, all the orginal Street fighter 2 characters are in it, plus all the alpha character the game is pretty sweet but also complicated play it if you like fighting games.
PSX : - Suikoden 1 & 2 - Brave Fencer Musashi - Final Fantasy VII-IX PS2 : - Kingdom Hearts 1 & 2 - Final Fantasy X - Persona 3/FES & 4
PSX : -Final Fantasy VII, VIII, IX -Tales of Phantasia & Destiny PS2 : -Persona 4 -Tales of the Abyss -Final Fantasy X & XII -KH 1 & 2 -Dynasty Warriors 6 -Warriors Orochi 2 PSP : -Persona -Dynasty Warriors Strikeforce -Warriors Orochi 2 -Disgaea 2 -FF Dissidia & Crisis Core...
PS1 - Crash Bandicoot series PS2 -Okami -Namco X Capcom -Jak & Daxter series -Dragon Quest VIII -GTA: San Andreas -Time Splitters: Future Perfect -Disgaea -and other games I forgot to post...
-Medievil 1 and 2 - gotta love the music on them, really take you to another world! -Metal Gear Sold - absolute genious, it's like watching a movie -The Worms series and Hogs of War, but don't touch Worms 3D -THPS 1 and 2, and Dave Mirra Freestyle BMX, but not Matt Hoffmans -Gran Turismo - Simply legendary - The Tekken Series Post Merge: [time]1255640845[/time] Oh, and Oddworld: Abe's Oddessey, some panoramic views and especially difficult and frustrating at times!!!
I really am more of a PS3 person but here are some games from each system that I've played and really enjoyed... PS1 (haven't played too many ps1 games) -Final Fantasy VII (can also be downloaded on PSN to PSP or PS3) PS2 -Okami -Kingdom Hearts I & II -Final Fantasy X PSP -Crisis Core: Final Fantasy VII -Patapon PS3 -Uncharted: Drakes Fortune -Uncharted 2: Among Thieves -Valkyria Chronicles -Assassin's Creed -Bionic Commando: Rearmed (PSN...good ole fun) That's all I can think of right at this moment, but I'm sure I'm forgetting a few.
PSX -Suikoden 2 -Armored Core -Xenogears -Tenchu -Final Fantasy Tactics -Front mission 3 PS2 -Way of the samurai 1&2 -Armored core series (3,silent line, nexus, last raven) -Dynasty warriors -.hack series (infection-quarantine,GU) -Persona 3&4 -Tales of the abyss -Suikoden 5 -Ace combat 4,5 and Zero -Disgaea 1&2 -G Generation Gundam (Neo,SEED,Spirits,WARS) -