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Well today I got around to looking at the xtd files that were posted and I was able to decompress them. I will make a tool to do it later on once we get a bit more info on the actual format of the decompressed data.

Im kinda tired right now but maybe tomorrow ill post some more info.

Alright good news! Well for me at least. :P I figured out the compression used for Gears of War 2, it is LZX. It is supplied as a library through the Xbox 360 XeXDK. I can't talk much about how to get it or how its used, but I can say that it is in fact LZX and I have gotten the files to decompress....

The one thing I know exactly, the compressor is the same as in Devil May Cry 4 (it is discussed on xentax already). Probably, the modification of MS LZX algorithm, but I am not sure.. The one, who will find, what the damn routine (in wild) can return the error code 81DE2001h, will find that compres...

The past few days I have been modding Gears of War 2, but now I think its time to move from modding the ini's to actually modding the game assets. There are many .xxx files which are compressed, The compression I am unsure of but I am aware that the original Gears of War used LZO. Each file has a he...