this is the file of TERA ,someone had already put ENGLISH patch .
thiis is his TWITTER http://twitter.com/mkisods
this is the TERA's DATA files: click here

this game size over 20G ... I can't OD the game client .WRS wrote:the file is either compressed or encrypted.
it's not practical to reverse the format from just these patch files - reversing the game client is the only real option.