I have played Atari 2600 in a friend's house but i don't remember anything.

Probably the oldest game i have played is Donkey Kong on Amstrad CPC (Released in 1981 on Arcades) or some Amstrad CPC/Arcade game when i was a little kid.

Donkey Kong in Amstrad Playing as Super Mario  

The best Arcade game i have ever seen is Double Dragon.
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The first game i saw in another's kid's amstrad cpc was that.

The game: Super Cobra (MSX)

The experience: 5 years old me dying 60 times per minute.

https://youtube.com/shorts/I8mHd0XHcqg?si=X3oAmKGIMQIvibEY

Edit: misread the title. Super Cobra was my first game. I'm not sure which one is the oldest I played. Probably Space Invaders, I played it for a few minutes in total and enjoyed it for what it was.

Actually, turns out I lied; just checked the release date and Breakout for the 2600 came out two years earlier in 1978, so that's my oldest.

Again, an example of how a simple enjoyable concept still holds up.

Oldest game I played is definitely Pong. Like Nintendo and Sega, I also had an Atari when I was born/young. I much prefer Breakout though.

- Pong on a Pong console
- (Colossal Cave) Adventure - Windows port of the 1977 version
- Breakout, Asteroids, Missile Commad and Pac-Man on Arcade machines
- Mystery House (1980, first game of Sierra) via ScummVM
- Zork (MS-DOS + iPad version)

Growing up, the first console I remember us having was an iteration of this system - https://en.wikipedia.org/wiki/1292_Advanced_Programmable_Video_System

We had several games - this is probably the one I remember the most

I was going to say Pacman, but Breakout is probably the answer… unless I’m remembering Arkanoid. I have a clear memory of Arkanoid at least, but that was a few years after Pacman.

But then someone reminded me of an even older game I played… Zork, although I played a later shovelware port which came with a bunch of other text adventure games.

It's hard to say which has been the oldest. My first gaming experience was in the mid 90s when I was visiting my uncle abroad, he had a PC and the original SimCity - I somehow knew then that it wasn't my kinda game but of course I played it for hours anyway.

Ah, Alley Cat, I remember. And like you, no idea what the goal was.