If you don’t own Quake 3 you can look at the demo data. Download the Quake III Arena Demo and look at the content of demoq3/pak0.pk3 [50MB]. It’s the only pk3 and has all the content for the demo version (models, game-logic, fonts, maps, etc). The demo is missing some weapons and item icons, models, and sounds found in the full version of Quake 3 (in baseq3/pak0.pk3 [500MB]) but otherwise it’s a pretty bare bones example of required data for Quake 3.
To actually run the demo data on ioquake3 you need to replace files in demoq3/pak0.pk3/vm/*.qvm (the game-logic) and demoq3/pak0.pk3/botfiles/inv.h (which must match inventory indexes compiled into the game-logic, otherwise bots only use Gauntlet). You can use the baseq3/vm/*.qvm or baseq3/*.dll game-logic in ioquake3 test builds or compile the qvms/dlls yourself (see building ioquake3). Replace botfiles/inv.h with code/game/inv.h in quake3 1.32 / ioquake3 source code and then delete #define WEAPONINDEX_GAUNTLET line through #define WEAPONINDEX_GRAPPLING_HOOK as they conflict with defines in demoq3/pak0.pk3/botfiles/weapons.c.
The baseq3/pak[1-8].pk3 were added in updates to the full version of Quake 3. (These changes are missing from the demo version and also acts as a list of what is not in baseq3/pak0.pk3.)
- pak1 - update qvms, add CTF flag icons, updates botfiles
- pak2 - includes all pak1 files. new map (q3tourney6_ctf), textures, and players. q3dm9 map updated.
- pak3 - update qvms
- pak4 - update qvms, large botfiles update, new graphics/sounds co-developed with Quake III: Team Arena
- pak5 - add graphic and shader for medal_capture
- pak6 - update qvms, add graphics and shaders for lightningNew and cg_oldRocket 0
- pak7 - update qvms
- pak8 - update qvms, add punkbuster ui graphic