Virtual crime or in-game crime refers to a virtual criminal act that takes place in a massively multiplayer online game (such as an MMORPG), or within the broader metaverse. The huge time and effort invested into such games can lead online "crime" to spill over into real world crime, and even blur the distinctions between the two. Some countries have introduced special police investigation units to cover such "virtual crimes". South Korea is one such country and looked into 22,000 cases in the first six months of 2003.