Space Invaders. An old arcade / betting shop at the bottom of the street I lived on....I used to sneak in with some friends and we would spend our pocket money on it, 10p a game.
I was immediately hooked although my parents never bought me a console (like an Atari etc.) I did get some handheld pacman games and a mini Arcade of a defender type game that shot beams at enemies from the front and dropped bombs at targets below.
A Spectrum 48k was my first real computer (although I played on some peoples BBC computers, and Commodores. Ahhhh those halcyon days of Manic Minor, Jet Set Willy and a slight obsession with a football manager game.
Firs game ever I can remember is GODS on the old DOS. You were a warrior (Hercules maybe?) that goes through some platforming and 2D combat to defy the gods. Really good, actually played it last year again on a remaster of sorts.
Probably Turok: Dinosaur Hunter or The Legend Of Zelda: Ocarina of Time on the N64. I was like, four or something and it was my dad's.
The first PC game I ever played was probably Garry's Mod, but the first PC game I ever beat was V411-Hall-A: A Cyberpunk Bartender Action, My overall favourite PC game, on the other hand, is 100% Resident Evil 7: Biohazard.
Honestly the first game I ever remember playing was the Mario/Duck Hunt combo cartridge on NES. I also remember getting the grey light gun and wishing that I could get the orange and white one instead.
I recall a game on the Amiga 2000 computer called Dungeon Master which was a first person fantasy dungeon crawl rpg. There was one point in the game where my character was in a room and I realized that I could hear what sounded like Egyptian mummies walking around the periphery of the room in a 3D soundscape. With chains clanking and staggering footsteps, I could actually track their exact progress, and accurately know where they were. When I realized that I kind of freaked out, hair all over my body and head stood up. What a blast that moment was.
That was one of the most memorable gaming moments. Along with the Wasteland line of games including Fallout and Fallout 4, as well as the Shadowrun, and Skyrim games I was pretty much hooked on the RPG Genre.
The first game I remember playing has to be Crash Bandicoot on the original PlayStation. While the game is dated, it's still some of the most fun I've had playing video games. I still need to pick up the remastered versions on Steam.