http://en.wikipedia.org/wiki/Yo!_Noid
God damn. It's as simple as that. I remember being young, and one day my dad was all excited from finally beating this game - which is actually unbelievably hard. It's like 20 some levels, you get no lives, it's easy as hell to die.. Anyway, he says he beat it, and I know he was a tweaker or heroin, or something (never really sure with my dad's side of the family, it's always something). But probably tweak at the time, that's the ONLY way he could have beat the game.
Later, playing it on emulators with save-states, it still took me quite some time to actually beat that shit.
Also, next-to-impossible to beat shooter games. Like this one
http://en.wikipedia.org/wiki/Psyvariar_2
Image one
Image two.
That's the kind of shit that's always going on, on-screen. It's fucking intense.
I remember, playing the xbox version, hardest settings, all my friends tried for days while just sitting and getting stoned, tripping occasionally, blah blah.. Could never beat it. One day, I snort the fattest line of 2C-B I've EVER seen, followed by an equally big one 20 minutes later (~90mg in all) and start playing the game, and FINALLY beat it!. Don't know how whilst tripping that profusely, while all the other times none of us could beat it, but not only was I beating it, I was kicking ass, racking up points and extra bombs, killing 100% enemies and shit. It was fucking weird.