ShadowMan from 1999. That's one of the (if not the) first narrative action adventure games I ever played and a big part of my childhood. The mixture of blood, gore, creepy music and enemies and great setpieces (you play as the walker between the worlds of the dead and the living and can switch between them) fascinates me to this day. When I was a child, it gave me quite a few nightmares, but I still finished it. It's an absolute masterpiece.

NightDive recently remastered it and it's even better now.

ARSENAL Extended Power. An old strategy game from the early 2000s. Still fire it up once a year to mess around.

I have NEVER uninstalled "Deus Ex."

Fnv

final fantasy 11

I've been replaying Tenkaichi 2 lately

Battle for Atlantis

Haven't done it, but i always wanted to put all the GTAs into one world, along with modded areas, and have it all connected.

Peggle. As a grown ass person I still play it at least once every couple of weeks. Stupid fun when you don't want to pay too much attention.

original snes super mario world is still a blast, tetris is another game that's still fun

1994's virtua-cop

Black & White H.A.V.O.C.

Gorf, 2600

Master of Magic.

Space Quest 3. Wonderful story, funny, good music, and it always gave me this wistful feeling for some reason.

I still play doom, although I try a lot of newer wads. It's crazy that there's basically 30 years of free content people have been creating since it came out (even if most stuff much past 10 or 15 years old can feel kinda dated and not so interesting to play).

I'll still play a few of the SNES classics from my childhood sometimes. Super Mario world, Yoshis island, that kinda stuff.

Tetris DX, either on original hardware or my Analogue Pocket

Whenever I can find it- Centipede. Especially if it's in a cabinet with the trackball.

Otherwise I play Donkey Kong Country a fair amount. Or Super Mario World. SNES games are my jam

Online gaming wise Call of Duty: United Offensive (2004)

As for single player gaming, donkey Kong Land 1 for gameboy is the oldest game I’m actively playing. I have various NES launch games in my collection, those would be the oldest games in my collection that I have played.

Lord of the Rings Online (2008)

Made so many lasting friends over the years. Great community.

Unreal World. Released in 1992. Though I didn't first play until 2010ish when I moved to linux.

gorilla.bas

Blaster Master. One day I will complete it.