WOW (World of Warcraft)

[NeonSamurai]

WoW, one of the grindiest MMO's ever. You grind levels, then you grind gold, then you grind item sets, then you grind pvp levels. I found the game to be utterly mindless and repetitive, and there is always one more little thing to grind for, then the next expansion comes out making all the stuff you spent months on end grinding for, doing the same instances over and over and over and over and over, utterly worthless and requiring more grinding still.

As for addictiveness level, people have actually died from overplaying this game due to not eating and/or not sleeping.