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Fatal error: Hunk Alloc: bad size

From Quake Wiki

The map or mod you tried to play requires more memory than Quake allocated by itself. You need to tell the engine to use more memory, append the following option to the commandline:

Engine/EXE 32 Megabytes 64 Megabytes
quake.exe -mem 32 -mem 64
winquake.exe -winmem 32 -winmem 64
glquake.exe and any glquake derivate -heapsize 32000 -heapsize 64000

64 Megabytes should be more than enough, 32 Megabytes will be enough in most cases.