PlayStation 1

1. Final Fantasy IX

2. G-Darius

3. Grandia

Honorable Mentions. Xenogears. Strider 2. Wolf Fang. Einhander. FF7. 

PlayStation 2

1. Zone of the Enders 2ND Runner

2. God Hand

3. Gungrave

Honorable Mentions. DMC. DMC3. Neo Contra. Gradius V. Shinobi. Nightshade. Okami. 

PlayStation 3

1. VanQuish

2. EX Troopers

3. Strider

Honorable mentions. Binary Domain. Metal Gear Rising. Dragon's Crown. Dragon Age Origins. Kingdoms of Amalur. Transformers Fall of Cybertron.

PlayStation 4

1. Assault Suit Leynos Remake

2. Nex-Machina

3. Yakuza 0/Nier Automata

Honorable mentions to ZOE2 HD. Metal Wolf Chaos. Bulletstorm Remaster. DMC5. Ruiner

PlayStation 5

1. GunGrave Gore

2. The Ascent. 

3. Stellar Blade

Honorable mentions. Cyberpunk 2077. Evil West. Prodeus. Raidou. Scarlet Nexus. SMTVV. Soulstice. 

PS1:
MGS, FF7, Crash Team Racing.

PS2:
Shadow of the Colossus, Devil May Cry, Zone of the Enders 2.

PS3:
The Last of Us, Uncharted 2, MGS4.

PS4:
Bloodborne, Sekiro, NieR Automata.

PS5:
FF7 Rebirth, and then it's close between GT7, Unicorn Overlord, Astro Bot, Trails in the Sky 1st Chapter, and Where Winds Meet.

PS1:

1. Final Fantasy IX
2. The Legend of Dragoon
3. Final Fantasy VIII

Honourable mentions: Final Fantasy VII, Grandia, Suikoden II

PS2:

1. Shadow of the Colossus
2. Final Fantasy X
3. Persona 4

Honourable mentions: Okami, Final Fantasy XII, Kingdom Hearts 2

PS3:

1. Dark Souls
2. Valkyria Chronicles
3. The Last of Us

Honourable mentions: Metal Gear Solid: Snake Eater (I've only played the HD remaster, never the PS2 original), Trails of Cold Steel 1&2, Dark Souls II, Uncharted 2

PS4:

1. Bloodborne
2. Dark Souls III
3. Horizon Zero Dawn

Honourable mentions: Nier: Automata, Uncharted 4, Valkyria Chronicles 4, Trails of Cold Steel 3&4, FFVII Remake, The Last of Us Part II, Tales of Berseria

PS5:

1. Elden Ring
2. Horizon Forbidden West
3. Clair Obscur: Expedition 33

Honourable mentions: FFVII Rebirth, Astro Bot, A Plague Tale: Requiem, Trails in the Sky 1st chapter, Demon's Souls, Final Fantasy XVI

PS1
Crash Bandicoot 3 Warped
Looney Tunes Sheep Raider
Yugioh Forbidden Memories

PS2
Ape Escape 2
God of War 2
Sly 2 Band of Thieves

PS3
God of War 3
Sly Cooper Thieves in Time
Dark Souls 2

PS4
The Witcher 3 Wild Hunt
God of War Ragnarök
Crash Bandicoot 4 It's About Time

PS5
Baldurs Gate III
Clair Obscur: Expedition 33
Elden Ring

Oh, tough one.

ps1: FF7, FF Tactics and RE
ps2: GoW, Colossus and Sly 2
ps3: Demon Souls, Dark Souls and Dark Souls 2
ps4: Bloodborne, Dark Souls 3, god of war
ps5: nothing, went PC, lol. but would have put spider 2, ragnarok and forbidden west