Can't believe I nearly forgot that one. It played a major role in my childhood.
Duke Nukem 3D. Played the demo, Played the First Chapter when it came out with a magazine, played the entire game when my dad bought it.
Bought myself the
Duke Nukem KILL-A-TON Edition Plutonium Pack: The original game, an extra chapter and a shit ton of expansion packs. (Nuclear Winter Xmas Pack, Duke it out in the Carribean, Duke it out in DC. and another crap load of 3rd party maps) It was an 18 rated box set the size of a PC Case. I got it when I was 7.
Doom, Doom 2, Quake and Quake 2 came and went. Half-Life came and has never left me.
Finally, got my hands on the level editor and built some incredibly basic rooms. This was around the time my bro-in-law was messing around with HL mapping. You can guess where I went from there.
After all these years, I still prefer the MIDI version of
Megadeth