Super Smash Bros. Melee
I loved that game and counted down the minutes for months when I was young. It was the first T rated game I could convince my parents to buy. And once I had it I played it nonstop for months.
I don't know what it was about that game, maybe it was my lack of understanding of computers back then as opposed to now, but I had unlocked EVERY character, EVERY map, EVERY challenge, EVERY race-to-the-finish... everything.
Then I lost it.
The first time it happened it devastated me. Hey, I was 7 years old, what could I do but just unplug and replug for hours on end.
A couple years later... I got back on, rebooted the system, restarted from scratch, unlocked EVERY character, EVERY map, yada yada yada.... everything.
Then I lost it again.
Eventually, after years of gathering dust, and several house moves later, after I had gained a much better understanding of electronics, consoles, and just gaming technology and the industry as a whole, I was rummaging through old things in old closets for some components to help a friend build a computer, and in an old half-broken cardboard box, I found the source of one of my most painful childhood memories...
So I kicked its ass.
Now I have everything, and I mean everything, again. I'll hook up the old GameCube and beat down some Master Hand ass with Link or maybe Samus and hell maybe I'll faceroll with Marth when I'm angry now and again but mostly, I just use it as a trophy for overcoming my childhood enemy

.
I know it's not the most dramatic or serious story but I'm entertained by it.