In mid 2000s I got obsessed with silencing my PC and wasted quite a lot of money with unsatisfactory results.
Around that time I fried my AthlonXP 1900+ by installing the cooler wrongly.
The last mistake was this year when I connected an old LED light to my PSU, I don't know what I did wrong but my motherboard fried, luckily everything else survived.
Deus Ex (2000) - a game that pushes the boundaries of what the video game medium is capable of to a degree unmatched to this very day.