Mazogs on my godparents ZX81. The game was basically navigating a maze and occasionally fighting spiders. Which was a luck based thing where you just ran into them and waited for the result. Not very exciting but novel at the time.
But it probably wasn’t the very first game. I grew up in a tiny coastal tourist town that had four arcades. So it’s more likely the earliest games I played were in them but I don’t have a defined ‘first’ memory. They were fairly ubiquitous arcade games so: Space invaders; Donkey Kong; Pac-man; Asteroids; Frogger; Pole position; Paper boy; Lunar lander, etc.
I think the first game that I ever got addicted to (partly because I had the pocket money to sustain the addiction) was Ghosts and Goblins. Been chasing that buzz ever since lol.
Offshoring profit
Extra points for not lifting the spagetti pile when you’re hovering.