A compressed data packaging format created by Phil Katz (PKWARE), used by games as a virtual file system and generic data packaging. Commonly the extension is changed to something else to prevent players from thinking they'd need to unpack them.
The first video game about Zip was released on December 2, 1999.
|A||1989 - First pkzip release|
|B||1992 - First Info-ZIP release|
|C||1993 - Deflate algorithm added|
|D||1996 - Deflate64 algorithm added|
|E||1998 - Integrated support in Windows OSes|