As a kid, probably Lode Runner. It ran on my pc. Some arcade games were fun. I enjoyed [Asteroids](en.wikipedia.org/wiki/Asteroids_(video_game\)). Colossal Cave, and the Infocom games like Planetfall were fun too. Though what really hooked me was Doom. It was the first real 3d FPS game and it blew my mind. It’s been my favorite genre ever since.