In timeline order, one per system…

1. Pitfall (Atari 2600)
2. Racing Destruction Set (Commodore 64)
3. Super Mario Brothers 2 (NES)
4. Street Fighter II and all the hyper/turbo variants (arcade)
5. Doom (the original shareware version) (PC) https://twitter.com/jakeregal/status/1260449257821216768
Agonizingly close seconds…

Yar's Revenge
Adventure Construction Set
SMB3
UFO: Enemy Unknown, aka the original X-Com
side note: there is a playable online version of Doom! https://classicreload.com/dosx-doom.html 
Doom

https://classicreload.com/dosx-doom.html
And Pitfall https://classicreload.com/atari-2600-pitfall.html
Pitfall!

https://classicreload.com/atari-2600-pitfall.html
dammit... this thread led me down a rabbit hole of C64 emulators online... gotta get back to work
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