/usr/share/starfighter/data/aliens4.dat is in starfighter-data 1.2-2.
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 7 8 9 10
0 9 1 9 2 9 3 9 4 9 5 9 6 9 7 9 8 9 -1