Naughty Dog confirmed that violence and gore have been toned down/censored in the European version of The Last of Us.
After noticing the differences between the European and North American versions of the game, Naughty Dog forums member Ramify contacted the developer and received confirmation that The Last of US has been "slightly changed" to accommodate legal requirements in each territory.
"The gore and violence ratings are subject to local regulatory boards in various countries, so the game must be slightly changed in order to accommodate those choices," said Naughty Dog representative, EvangM.
There is no official list of differences, but fans over the internet have discovered that blood spray has been reduced significantly and that enemies cannot be dismembered in the European version’s multiplayer mode.