Doom (activity)

Doom is a terrifying, bloodthirsty game involving running around dungeons and shooting at monsters. It is probably not for young children, but is great fun for older ones.

[Freedoom] is a free software clone of Doom, based on improvements made to Doom's 3d engine with new maps and monsters.

Video of Doom played on the OLPC

<youtube>9MhQ5jIj5aw</youtube>

How to install

The following instructions need to be run from the Terminal activity. You will need a working internet connection on your OLPC for the install only. The instructions worked on a B4 OLPC laptop running Build 650.

• Open the terminal
• Switch to the root user, by typing:

su -

...and entering the root password, if requested to.

• Then type

yum install prboom

• The download is about 18MB, so will take a few minutes.
• When you get a prompt again, type:

exit

• To run Doom, type

prboom

Changing Doom to run in full screen mode

To run in full screen mode, type:

prboom -geom 1200x900

To permanently adjust Freedoom to run in full screen mode all the time, type:

cd /home/olpc/.prboom
nano prboom.cfg

This will open the freedoom configuration file in the nano text editor. Find the two lines in the file with the words:

width         640
height        480

And change them to:

width         1200
height        900

Then type ctrl-x to exit, and type y to save your changes. Now, Freedoom should run in full screen mode when you type

prboom

See also

• [[1]] The offical Freedoom homepage.
• [[2]] Another video of Freedoom on the OLPC.
• [[3]] The OLPCNews forum page about Freedoom on the xo.