Copy the pk3 file(s) for the map and Quake III Arena's pak0.pk3 file to the baseq3 folder of your installation.Install the map and the Quake III Arena Asset file:.FreeBSD: build the port (games/ioquake3) or run `pkg_add -r ioquake3`.Linux: Download the installer scripts for your platform from ioQuake3 website or use your favourite package manager to install it (eg, `apt-get install ioquake3`).Run it and follow the instructions in the installer Mac: download universal binary DMG file from the ioQuake3 website.Run both and follow the instructions in the installer The map pk3 files (see 'Download' below).A 3D capable graphics card and drivers (Note: Intel integrated graphics are adequate, but the Intel drivers on FreeBSD 9.0 and below are not).A copy of the original Quake III Arena installation media, or the pak0.pk3 asset file from an existing installation.The maps are playable in Quake III Arena and derivaties (eg, OpenArena). A couple of high vantage points allow for picking off enemies from a distance, but not without being entirely exposed. The EN605 map is larger, with more open areas to do battle in. Nine years later, Chris Holman constructed the successor, EN605. Some concealed teleporters will take you to places of interest around the map, but you'll need more than a teleporter to find the BFG. The map has a number of confined areas, allowing for intense duels and quick escapes. The map features custom textures, sounds and music, produced as part of the project to make the map feel more like CAIA. After 12 weeks of careful construction and intensive playtesting, it was done. In 2003, Claudio Favi was tasked with reproducing the original CAIA lab, AS327, in a Quake III Arena map.

How to install ioquake3