Binaries are available for download in the download area but if you want, you can get the source directly from the git repository. I have put together a little guide below.

I have built and developed the game on both Ubuntu (10.10) and Gentoo. To build the project on those two systems you need Git to download and CMake to build the source. You can find them in the packet manager of your system.

Download the source

git clone git://subspacebattle.git.sourceforge.net/ gitroot/subspacebattle/subspacebattle

Install the dependencies

We need to add some extra packages to be able to build the source.

Ubuntu

sudo apt-get install libsdl1.2-dev libsdl-net1.2-dev libsdl-sound1.2-dev libsdl-image1.2-dev libsdl-mixer1.2-dev
Download Irrlicht and follow the guide to install it HERE

Gentoo

sudo emerge libsdl sdl-net sdl-sound sdl-mixer sdl-image irrlicht

Building

Run the commands in the "trunk" directory:
cmake . && make

More information about the game can be found at the project website! Please also have a look at the Wiki