In the early days of home computers, a trip to the local computer store might
occasionally turn up a locally produced game, hanging on the wall in a baggie.
One such example, purchased along with my first Apple II+ was "John's Space War
Games - Saga I".  The documentation consisted of nothing more than the following
text, which appeared on a label on the disk sleeve:

John's Space War Games - Saga I
By John Broderick, CPA
8635 Shagrock
Dallas, TX 75238

To play, press C)ombat
To demo, press D)emo

----- Key Press Codes -----
S     = Speaker on/off
C     = Enter combat
X     = Exit combat
W     = Warp spd (1-9)
I     = Ion spd (1-9)
F     = Forward drive
R     = Reverse drive
ESC   = Restart game
T     = Torpedo firing skill (1-6)
E     = Evasive action skill (1-6)

BLUE  = Robot Ships Destroyed
GOLD  = Commando Ships Destroyed
RED   = Torpedo energy remaining
GREEN = Shile energy remaining