The developers at Netherrealm Studios have been diligent in adding more characters to Mortal Kombat, releasing a free compatibility pack (to support online matches) alongside each bloody gush of new content. Creepy Elm Street loiterer Freddy Krueger calls for "Compatibility Pack #4" when he arrives on August 9.

Once downloaded, the pack grants access to "Klassic Sub-Zero" (as he appeared in Mortal Kombat 3), and "Retro Cyber Sub-Zero," another cyborg ninja variant and a consistently effective sign that we're talking about video games here.

Freddy Krueger is available on Xbox Live and PlayStation Network for $5, or as part of the Mortal Kombat Season Pass for $15.

This article was originally published on Joystiq.