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What does PK3 stand for?

PK3 stands for Quake 3 Engine (compressed file format; Id software file extension)

This definition appears very rarely and is found in the following Acronym Finder categories:

  • Information technology (IT) and computers
  • Business, finance, etc.

Samples in periodicals archive:

It's all powered by the Quake 3 engine, which means texture-rich graphics at decent frame rates, provided your machine is up to it.
Then there is Star Trek Voyager, a 3D blast 'em up using the Quake 3 engine to pit gamers against the Borg.