Complete Guide: Configure and Customise ioQuake3 in Linux

Following the article on configuring Urban Terror, a popular first-person shooter game based on the ioQuake3 engine, here is a guide for configuring the original ioQuake3 game, including customisation of cvars, using new maps, weapons and characters models, and more. This guide will also successfully apply to the newer OpenArena game, which is practically ioQuake3 with changed weapons, maps and models.