These contain new assets — they will not replace your legal pak0.pak .
This is the classic error indicating Quake cannot locate pak0.pak . :
To use these files with a modern "source port" (like Quakespasm or Ironwail), follow these steps: Quake Brutalist Jam III - Slipseer
What (e.g., Quakespasm, vkQuake, DarkPlaces) do you plan on using? Are you on Windows, Linux, or Mac ? AI responses may include mistakes. Learn more