BBC Micro. No one really used it in the classroom as it only had BASIC. So I wrote a multiplayer Tron / Blockade / Snake clone to play with friends having read some of the user guide that explained how to draw lines… Each player had two buttons: one to turn 90 left and one to turn 90 right. Pretty sure it used MODE 5 so there was only three players / colours and the black background. The next day, everyone wanted to play my game at lunch time and it remained a hit for weeks.

The following year we got a computer lab full of Acorn Archimedes computers and I wrote another Tron version but this time with four players, power ups, obstacles, hazards, a menu to change some variables like speed, frequency of power up drops and hazards et, a scoring system, a few animations for deaths and powerups, and a bitmap icon for the game package so it looked really legit.

At some point we got a networked server for a file share and the game was the first game on the share. Because the code was just there for anyone to copy and change, but the time I left for my next school, there was so many different versions of the game with different modes, colors, themes, etc. I’ve been a fan of open source ever since haha.

@imekon
Remembering a gleeful childhood moment one afternoon then deciding to search "learn game programming".
I m now working on XR.

I had an intense moment of hubris while playing Hammerwatch with some friends where I thought "I could do this". That's how I learned C# and got the job I have now.