I was horribly/wonderfully addicted to Tetris.
It got to the point that I had to throw the cartridge into the box I kept the vacumn cleaner in, in the back of a crowded closet. If I wanted to play Tetris, I'd have to pull the carton out of the closet, pull out the vacumn and then dig through the packing material at the bottom. It wasn't always enough of a disincentive. Addicted.
I'm quite fond of the version on Facebook. I don't spend hours on it, but I still get a huge kick (and high scores of course
) out of it when I play.
( I just checked - I've still got the gameboy and the cartridges in a cabinet that's a bit awkward to get at - still there for a gaming emergency