I noticed that pretty much all games I played in my life have been released after 1990. So now I’m asking those with earlier experience here: 
Which games can you recommend from before that time?
But: they should still be fun in their own right and not just interesting to play in an historian sense of trying to understand how genres developed.
Games I played that are older than 1990:
- Tetris (classic for a reason)
- Pacman (interesting but simple)
- Prince of Persia (was too young to understand how to correctly play this game, I should maybe try to play it again)
- The Legend of Zelda (too old school and clunky for my liking)


With all due respect, I have to disagree with you there. You seem to be lumping all Atari games into the 2600 category. The Atari computers had plenty of classics.
Ali Baba and the Forty Thieves
Star Raiders
Choplifter
Miner 2049er
The list goes on and on, and if you add in the Commodore, Apple, and TI computers it gets even bigger. Pre 90 consoles, you have Colecovision, Intellivision, etc. Of which I personally love love love Utopia for the Intellivision.
Valid! Computers are a huge blindspot for me, and there’s no doubt depth there.