Provided by: xscreensaver-data-extra_5.42+dfsg1-1ubuntu1_amd64 

NAME
penetrate - simulates a classic arcade shooting game
SYNOPSIS
penetrate [-display host:display.screen] [-root] [-window] [-install] [-noinstall] [-visual visual]
[-bgrowth microseconds] [-lrate number] [-smart number] [-fps]
DESCRIPTION
Penetrate simulates the arcade classic with the cities and the stuff shooting down from the sky and
stuff. The computer plays against itself, desperately defending the forces of good against those
thingies raining down. Bonus cities are awarded at ever-increasing intervals. Every five levels appears
a bonus round. The computer player gets progressively more intelligent as the game progresses. Better
aim, more economical with ammo, and better target selection. Points are in the bottom right, and high
score is in the bottom left. Start with -smart to have the computer player skip the learning process.
OPTIONS
-display host:display.screen
Specifies which X display we should use.
-root Draw on the root window.
-window Draw on a newly-created window. This is the default.
-install
Install a private colormap for the window.
-noinstall
Don't install a private colormap for the window.
-visual visual
Specify which visual to use. Legal values are the name of a visual class, or the id number
(decimal or hex) of a specific visual. Possible choices include
default, best, mono, monochrome, gray, grey, color, staticgray, staticcolor, truecolor,
grayscale, greyscale, pseudocolor, directcolor, number
If a decimal or hexadecimal number is used, XGetVisualInfo(3X) is consulted to obtain the
required visual.
-foreground color
Specifies the default foreground color.
-background color
Specifies the default background color.
-bgrowth integer
Specifies the growth rate of the bomb explosions.
-lrate integer
Set the initial rate of laser fire.
-smart Have the computer player skip the learning process.
-fps Display the current frame rate and CPU load.
BUGS
The layout of the screen isn't quite the same as the game this program tries to emulate. In this this
program, the missiles come out of the cities; when really, there are supposed to be three missile bases
on hills, with the cities in the valleys between them.
See http://www.mame.net/ for details.
COPYRIGHT
Copyright © 1999 Adam Miller. Permission to use, copy, modify, distribute, and sell this software and
its documentation for any purpose is hereby granted without fee, provided that the above copyright notice
appear in all copies and that both that copyright notice and this permission notice appear in supporting
documentation. No representations are made about the suitability of this software for any purpose. It
is provided "as is" without express or implied warranty.
AUTHOR
Adam Miller <adum@aya.yale.edu>, 1999.
X Version 11 5.42 (28-Dec-2018) penetrate(6x)