/usr/src/castle-game-engine-6.4/fonts/data/ is in castle-game-engine-src 6.4+dfsg1-2.
This file is owned by root:root, with mode 0o755.
..
/usr/src/castle-game-engine-6.4/fonts/data/AUTHORS.txt
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSans-Bold.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSans-BoldOblique.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSans-Oblique.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSans.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSansMono-Bold.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSansMono-BoldOblique.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSansMono-Oblique.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSansMono.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSerif-Bold.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSerif-BoldItalic.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSerif-Italic.ttf
/usr/src/castle-game-engine-6.4/fonts/data/DejaVuSerif.ttf