Asklemmy

• Nethack : old school roguelike

• Tale of Maj Eyal : removing of tediousness in old school roguelike

• Baldur Gate 2 : D&D implementation

• Civilization 2 : just one more turn

• Fallout 2 : narrative based on character build

• XCom : tactical combat with base building

• Jagged alliance: tactical combat with squad building

• Knight of Legend : best original turnbased combat system never done again

• Slay the Spire: For deck building

• Quake: playing with friend

In no particular order:

• Hero's Quest (from Sierra On-line)
• Valheim
• Fallout: New Vegas
• Skyrim
• No Man's Sky
• City of Heroes (can you believe it's legally back?!?)
• Red Dead Redemption II
• Planescape: Torment
• Stardew Valley
• Starfield

(I'm sure that last one will raise some eyebrows, but I've already got over 1k hours in it since launch. For all its faults, it scratches some itch of mine just right.)

sly 3

mirror’s edge

also portal 2 somewhere in there

No particular order, but it seems I hit quite a few different genres.

• Starcraft
• Stardew Valley
• Subnautica
• Final Fantasy Tactics
• Infamous
• Hades
• Star Wars: Knights of the Old Republic
• Halo 2
• Super Smash Brothers Melee
• Rome: Total War

Once again in no particular order: Ultimata IV - Quest of the Avatar

Sim City 2000

The Last of Us

Breath of the Wild

Trade Wars

Kingdom Hearts

Knights of the Old Republic

Civ 6

Omega - a dos game where you programmed Tanks and set them loose

And right now: Balatro

In no particular order:

• kenchi
• ghost recon wild lands
• s.t.a.l.k.e.r
• ready or not
• arma 3
• dayz
• mag
• cities skylines
• red dead redemption
• skate 3

• Suikoden 2
• Final Fantasy 7 (original)
• Dark Souls
• Resident Evil 1
• Castlevania SOTN
• D&D Warriors of the Eternal Sun
• Resident Evil 1 Remake (GC)
• Gran Turismo 4
• Road Rash 2
• Oblivion

Big shout out to SFA2, FFT:A/2, BOF series, Roadwarden.

10 feels too little to condense 40 years of games.

My top 10 in decreasing order (the first series' games I listed individually to give due credit to these masterpieces):

• Chronicles of Myrtana: Archolos (Gothic universe)
• Gothic 2 + Night of the Raven
• Gothic 1
• Fallout: New Vegas, Fallout 2, Fallout 1
• Mass Effect 2, Mass Effect, Mass Effect 3
• UFO Enemy Unknown (OpenXcom variant)
• Warcraft III + The Frozen Throne
• StarCraft, StarCraft II
• Unreal Tournament 2000 G.O.T.Y.
• No Man's Sky or Minecraft (contenders for 10th place)

1. Chrono Trigger

Okay done

dragon age origins
mass effect 2 red dead 2 baldurs gate 3 witcher 3 cyberpunk 2077 tetris horizon zero dawn dragon age inquisition resident evil 4

I'll add mine in no particular order:

Zelda: tears of the kingdom

Diablo 3

Secret of Mana

Skyrim/Oblivion

Super Mario Odyssey

Zelda: ocarina of time

Command: aces of the deep

Halo 3

Metal gear solid

Donkey Kong country 2

These are the games over gotten the most enjoyment out of over the years

In no particular order:

• Zelda Twilight Princess
• Xenoblade Chronicles X
• Dragon Nest (back when they had Level 60 cap)
• Kirby Planet Robobot
• Lost Odyssey
• Super Mario Galaxy 2
• Xenoblade Chronicles 3
• Super Smash Bros. Ultimate
• Mother 3
• A Hat in Time

Honorable Mentions:

• Blue Dragon
• Dragon Quest VII
• Cloudbuilt 
• Epic Battle Fantasy 3
• Zelda: Tears of the Kingdom
• The Witcher 3
• Minecraft (I stopped at version 1.11)
• The Evil Within 1
• Layer of fear

Bard's Tale
Ultima IV
Neuromancer
Phantasy Star II
Phantasy Star Online
Super Street Fighter II: Championship Edition
Destiny
Impossible Mission
Halo
Gain Ground

Boom Blocks - Wii - top of my list. Not because it's a good game, but because my kids and I had uproarious hours spent playing it together.
Video game I have not yet figured out the name of. It came out in 1986(ish?) and it had a robot/cyborg in a kind of metroidvania level set. Macintosh.
Doom, the original. Scared the PISS out of me. Then I played it hardcore after that. Doom II came out and I set up LAN parties and opened up my nascent IT outsourcing business for those. Helldivers 2 - Honestly, I haven't actually engaged with a game this hard for decades. Senua's Sacrifice - This game helped me considerably, in understanding the people I love. Doom 2016 - What's not to like. It's perfect. Starcraft II - When it came out. Excellent weaving of story and gameplay. HI-FI Rush - Unexpected fun. Zork - I would have never expected this level of amazing story telling this many years ago.
I know I am short of 10, but I can't think of anything else.

Solitaire and SkiFree.

Hylics 1/2

Half Life 1

Myst

Jet Set Radio Future

Bomb Rush Cyberfunk

Factorio

Doom II (heavily modded)

OpenRCT2

Voices of the Void

The Sims (I like the series as a whole, I feel like each game has its own pros and cons)

Elden ring

Borderlands 2

Pokemon emerald

Fallout 4

Monster Hunter world

Chivalry II

Gears of war 2

PUBG

Escape from Tarkov

Call of duty: World at war

Roughly in that order