/usr/share/games/gearhead2/series/arenastub.txt is in gearhead2-data 0.628-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 | % Arena Stub
ArenaUnit
Cash 2000000
name <Default>
UPDATE <UPDATEPROPS>
|