Destroy All Humans! (Xbox) .PKG

[phantaton]

All of the game files with the .PKG extension from the 2005 game Destroy All Humans! are compressed and I'm having trouble with getting them extracted. The algorithm BIZARRE_SKIP from QuickBMS almost works with it, but it seems to only be able to partially decompress the file. For example, everything inside of DISCARD.PKG is supposed to be compiled lua scripts but the output doesn't look quite right.

It appears that the compression method used for that game is some kind of variant of that algorithm.

I'd appreciate it if anyone is willing to take a look. I've been meaning to dig deeper into this game for years.

Samples:

DAH_Samples.7z

Edited May 23, 2024 by phantaton
Added more detail.

[NeoGT404]

I'll need the executable but from a quick glance there's always "21 E0 7A 42 AE 3D 3A 02" at the end after some padding to 0x800

the first 4 bytes of that sequence are probably the build date (Fri, 06.05.2005 03:10:25)

Edited May 24 by NeoGT404

[h3x3r]

They used custom algo same like PGR. In exe there is a address with function. But i have no idea how to retreive that offset/function.