Make sure that the driver to your 3D graphic card is proper installed and working.
Next you need is to install 32-bit libs to make Phobia III working;
Code:
sudo apt-get update && sudo apt-get upgrade sudo apt-get install ia32-libs wget http://www.boundlesssupremacy.com/Cappy/getlibs/getlibs-all.deb wget http://mirrors.kernel.org/ubuntu/pool/universe/g/gcc-2.95/libstdc++2.10-glibc2.2_2.95.4-24_i386.deb sudo dpkg -i getlibs-all.deb getlibs -p libvorbis0a libsmpeg0 libvorbisfile3 getlibs -i libstdc++2.10-glibc2.2_2.95.4-24_i386.deb sudo ln -s /usr/lib32/libvorbisfile.so.3 /usr/lib32/libvorbisfile.so.0
Done.
Download Phobia III for Linux to your Desktop.
Download
Code:
mkdir ~/.Games
cd ~/Desktop
tar jxfv phobia3-linux.tar.bz2 -C ~/.Games
Done.
Save phobia3.png to your Desktop.

cd ~/Desktop
mv phobia3.png ~/.Games/phobia3
nano ~/.Games/Phobia3-launch.sh
#!/bin/bash
cd ~/.Games/phobia3
./phobia3
Save [ctrl]+[o] & Exit [ctrl]+[x]
Code:
chmod +x ~/.Games/Phobia3-launch.sh alacarte
Go to the Game section in Alacarte and push the New Item button. Fill in;
Name: Phobia III
Command: sh /home/USERNAME/.Games/Phobia3-launch.sh
Comment: Blow up the Bugs.
Icon: ~/.Games/phobia3/phobia3.png
You can now launch from Phobia 3 by Applications tab —> Games —> Phobia 3
Enjoy!