xgal(6x) on Linux
The text 6542e12e17e2, as Debian 3.0 (Woody), Debian 2.2 (Potato) shipped it.
X11 version of the famous Galaga game
Flags it lists
-
-b -
-display -
-keyboard -
-mouse -
-noclipmask -
-nosound -
-nostars -
-nouseor -
-scores