Other than a bunch of obvious fun that I had with friends when I was a kid, and the first time that I played certain key games (DOOM, Zelda, Mario, Mega Man, Castlevania, Metroid, etc), my most memorable experience was something along the same vein as this. When DOOM 3 was still this huge, over-hyped sequel that wasn't close to being released yet (late-2002), someone at ATI leaked an alpha release of the game to the public. From what I remember, it was an early E3 demo, but that's beside the point.
There were three levels on there and it required a behemoth of a gaming rig to play at anything even remotely resembling "full speed," but it was a blast. We downloaded it to my buddy's PC (Darth Frogger, for those really old members) and gave the game a shot. It was laggy as all holy hell, running at about 15FPS in the best case scenario. Trying to gun down the first imp that we came across dropped it to 2FPS, which just ended up scaring the crap out of me when it finally caught up and the imp was nowhere to be seen. I shrieked like a little girl and everyone laughed at me.
It was the first time any of us had tried grabbing any leaked games and lead some of us into the pirating scene back when we didn't have jobs and couldn't keep up with the latest games on just an allowance. Still one of my favourite memories ever.
There was also the time that I got a blowjob while playing Mega Man 3 on the NES. That's right up there too.![]()