Unity package file

A Unity package file is a GZIP file used by the game engine Unity. With a Unity package file, it looks like the ".gz" or ".tar.gz" part was replaced with ".unitypackage". Unity package file can be extracted with 7zip, sometimes resulting in a file named "archtemp.tar".

These 4 .unitypackage files had the bytes "0x1f,0x8b" at offset zero (0):
 * http://128.192.206.60/share/files/unity/packages/arch.unitypackage
 * http://cdn.octo-dev.co.uk/unity3d/packages/Grave%20Stones%2002.unitypackage
 * http://www.wildfactor.net/Upload/Thunder.unitypackage
 * https://fossil.boisestate.edu/visualize/hexdump?name=6f8fc37143930a42ccae5198fdc2efe4ff7c218c - Google description: "Artifact 6f8fc37143930a42ccae5198fdc2efe4ff7c218c \ fossil.boisestate.edu › visualize › hexdump \ File visualize/branches/287/Unity/Vuforia/Assets/Targets.unitypackage — part of check-in ... 0000: 1f 8b 08 00 00 00 00 00 00 00 ec b7 53 74 26 40 ............St&@ ..."