/usr/share/games/etr/fonts/fonts.lst is in extremetuxracer-data 0.7.4-1.
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 | # list of fonts
*[name] normal [file] std.ttf
*[name] bold [file] stdbold.ttf
*[name] pc20 [file] pc_20.ttf
|