Make sure that your sourcelist is correctly set.
Next grab the required tools, libs and -devs to build and install Sword of Fargoal.
Code:
sudo aptitude update && sudo aptitude safe-upgrade
sudo aptitude install build-essential
sudo aptitude install liballegro4.2-dev
Done.
mkdir -p ~/.Games/SwordOfFargoal cd ~/Desktop unzip SwordofFargoalPC.zip cd fargoal/src make cd .. rm sword.exe mv * ~/.Games/SwordOfFargoal
Done.
Safe sword.png to your Desktop.

cd ~/Desktop
mv sword.png ~/.Games/SwordOfFargoal
nano ~/.Games/SwordOfFargoal-launch.sh
Add the following;
#!/bin/bash
cd ~/.Games/SwordOfFargoal
./sword
Save = [ctrl] + [o] & Exit = [ctrl] + [x]
Code:
chmod +x ~/.Games/SwordOfFargoal-launch.sh alacarte
Go to Games and make a new entry;
Name: Sword of Fargoal
Command: sh /home/USERNAME/.Games/SwordOfFargoal-launch.sh
Comment: Dungeon Crawler.
Icon: ~/.Games/SwordOfFargoal/sword.png
Exit.
You can now launch Sword of Fargoal by Applications tab —> Games —> Sword of Fargoals
Enjoy!