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PoP was great, I've played it on Amiga, but of course it isn't my first game. I think my very first game was “racchettoni” (so called in the family), it was just the famous pong game, but it wasn't purchased: my father built it — not programmed, but really built, I mean, hardware, chips, resistors, capacitors and so on — from scratch; I think it generated a RF signal to show the screen, because it was connected to a regular TV.

If this one doesn't count, the first game was on a Spectrum 48k, I am not sure between several games, but I've two candidates: a geography quiz (the main cities of this states, the longest river of this nation…) and Ant Attack.

amazing :D it looks like you really observed how computer technology grows

I'm not old enough to have met Babbage! It's only because many interesting changes happened in a relatively short time! :-)