These could be games that left a lasting impression on you, games that had stellar gameplay mechanics, characters that captivated you, games that you played tons of hours on, etc.
These days you can emulate old consoles almost perfectly, with a lot of quality of life improvements. The whole memory can be written and retrieved in milliseconds so you can save everywhere and anywhere.
A raspberry pi 4 can emulate any console up to the N64. I'm still running a pi 3. The 3 can't do the N64 well. I'm unsure how good the pi 4 is with the graphics of the N64.
I can run basically any game published before 1995. It's just a matter of finding roms. They used to be easy to get, but Nintendo got angry with websites that were hosting them. So now you have to dig a little more to get them.