With the establishment of video game classification groups in the 1990s and early 2000s, Resident Evil has been regionally edited to overcove restrictions. Due to the differing restrictions by Japan's "CERO"; Europe's "PEGI" and North America's "ESRB", Capcom has in recent years begun to self-censor its content to avoid having to undergo regional editing. A common reason for editing is footage of decapitation; in earlier games the animation was removed in regions opposed to it, with later titles simply not using decapitations but using trick camera work to imply it happened.