NES - rbi baseball
N64 - goldeneye
pc - warcraft
ps3 - call of duty 4
360 - halo 3

Deus Ex has to mentioned at least once.
Mafia as well, excellent PC game that everyone should pick up if they haven't played it. Sort of a 1930's GTA but with more story, phenomenal game.

no one mentioned X-Com? Seriously?

NES: "Pro-Am II"

SNES: "Turtles IV: Turtles in Time"

N64: "Mario Kart 64"

Sega Genesis/Mega Drive: "Toejam & Earl"

Playstation: I haven´t played it, but "Metal Slug X" looks great.

Ark Survival Evolved.

Elite. ZX Spectrum.

Damn what a bump. Deus ex pretty good.

Fallout new Vegas
Dead cells
Subnautica
Outer wilds
Ori will of wisps
Shadow tactics

Modern games mostly better for obvious reasons.

FF7
The Last of Us
Hollow Knight
GTA5
RDR2
Witcher 3
Days Gone
Chrono Trigger
Super Metroid

soulsborne

My top 10 in rough order is Super Metroid, Tetris, SMB3, Vice City, Metroid Prime, Elite, Street Fighter 2, Starcraft, OoT and Goldeneye. Football Manager as a series would be in there somewhere but I can't pick out a specific game

Commodore 64 - Jumpman Junior

I still remember the names of all the 12 levels

Nothing to it
Fire, Fire!
Sreddal
Hellstones
Figurites Revenge
Blackout
Walls
Spellbound
Zig-Zag
Herethereeverywhere
Hatchlings
Hurricane

PC - Supaplex (I recently replayed all levels on an emulator)

Yes, I'm old

Ill just list the best games from the different consoles I have had during my life.

SNES- Zelda: Link to the Past, Super Mario World, Super Metroid

N64- Super Smash Bros, Orcarina of Time and Majora's Mask, Goldeneye, Mario Kart. (TBH I never really played Super Mario 64 much as a kid)

PSOne- Crash Bandicoot

Gamecube - Metrioid Prime, Resident Evil 4 (my first M rated game), Super Mario Sunshine, Windwaker, Mario Kartouble Dash

Game Boy Advance - Pokemon, Advance Wars, Metroid Fusion, Metroid Zero Mission, Castlevania Aria of Sorrow, Zelda: The Minish Cap

Xbox 360 - Halo 3, CoD:Modern Warfare, Guitar Hero/Rock Band, Batman Arkham City, Bioshock, Portal 2

PC - Hollow Knight, Ori, Jedi: Fallen Order, Smite, Hearthstone, Overwatch, Escape from Tarkov, RDR2, Sekiro: Shadows Die Twice

Top ten in mainstream OMG THIS GAME IS AMAZING AND I PERSONALLY LOVE IT: LTTP, Ori 1, Rocket League, Super Mario Galaxy 1, SMG2, Ico (PS2), Earthbound, Super Mario World, Celeste, Mario Maker 2.

Taking out Mario: some Tetris variant, Contra 3, Super Monkey Ball 1/2, Wind Waker

Mega Man 2
Super Mario Bros 3
River City Ransom
Link's Awakening
NHL 95
NBA Live 96
Suikoden I & II
Star Wars: KOTOR
Grand Theft Auto: San Andreas
Halo 2
Bioshock
Fallout: New Vegas
Skyrim
Destiny
Breath of the Wild
Horizon Zero Dawn

Forgetting a ton, but these come to mind first.

In no order:

Skyrim
Pokemon Red
Rollercoaster Tycoon 2
Age Of Empires 2
They Are Billions
DayZ
CSGO
Fallout 4
GTA SA
Tomb Raider 1
Resident Evil 2
MGS 1
Minecraft
Red Dead Redemption 2

My all time favorite game, for the experience, was Call of Duty: Modern Warfare 2. I played it the most, in my opinion it was the best "pure" version of the game (despite dual shotguns), and the 2+2 representation was fantastic (wherefore art thou, Paddy?). Always a good group of solid players getting together to play SnD. I miss those days.

I still play the newer Call of Duty games, but I don't have as much time so don't get the hours/days in that I used to. Over the last few years Red Dead Redemption: 2 has been my favorite game.

N64 - goldeneye
PC - Warcraft 3 and counter strike

All plateform - Mario Kart

StarCraft: brood war.

nothing comes close

SMB3, SONIC2, SUPERSTREETFIGHTER2, MORTAL KOMBAT 2, ZELDA OOT, DIABLO 2, MADDEN SERIES, HALO3 AND HALO 5, DEAD SPACE, NBA2K20, ALL STAR BASEBALL.

GETTING A SWITCH LITE OVER THE WEEKEND.

Games that blew my mind/changed my perception of gaming - Baldur's Gate, Tibia, Deus Ex, Witcher 3.

Games I've spent an ungodly amount of time playing - Path if Exile, Eve Online, Grim Dawn.

Forgot Roller coaster tycoon on pc the original and the sims orginal on pc

Final Fantasy 7

Grand Theft Auto Vice City

Harvest Moon Back to Nature

One of my favorites as well. Been learning how to speedrun it which has been a lot of fun.

Games that changed gaming for me and that I spent a lot of time playing.
Doom (the original)
Unreal Tournament
Monkey Island 2
FF7
BG2
Neverwinter Nights - easily my most played. So many, many custom adventures. Shows what the community can do if given the resources. I'm playing Solasta now, which may scratch the NWN itch. Although don't think it's dungeon maker is as powerful as the NWN toolset.

persona 5 is the game of our lifetimes