4. Grand Theft Auto: San Andreas
Country that banned it: USA
Few serious gamers won't have heard of the infamous Hot Coffee scandal that embroiled Rockstar, GTA: San Andreas and the ESRB. In June 2005, an intrepid modder discovered and released a patch that unlocked a once inaccessible sex mini-game that was hidden in the game's code. Although Rockstar hadn't intended for this to be seen in the final version, the outcry was enough for the ESRB to reclassify the game as Adults Only in the US. Although that's not, strictly speaking, an outright ban, most retailers and each of the major console makers have strict rules about not allowing AO titles.