Hellfire Arena is a modification for Quake III Arena. This mod has many features that are derived from many different modifications compiled into one. Although there are many features that have been derived from other mods, Hellfire Arena has it's own distinct features as well.

Features :

- Starting Powerup Options - Haste, Invisibility, Regeneration, Flight, Battlesuit, Quad Damage And Random Powerups
- Customise bot options such as bot chatting, fast chatting, rocket jump and more challenging bots
- Select between grenade types - standard issue, vortex, impact, cluster and sticky grenades (aka proximity grenades)
- Select weapon position - right, left or center
- Customise starting statistics - health, maximum health, armor and weapons
- Random Weapons - a weapon is randomly selected by the server and every client gets the same weapon with unlimited   ammo. This option can be fully customised by the server on which weapon to cycle / select randomly.
- Toggle between fast or normal weapon switching mode
- Cache all maps - this will cache all maps in the game server map selection screen, it will take some time to cache ALL
  of the maps but will speed up map selection.
- Enhanced Map selection UI - has several new options such as map filter, map source and list mode
- ALL maps are now displayed, regardless of whether the map has a .arena script or not
- Map Rotation can be done in game server screen instead of setting cvars up
- Score on podiums
- Spawn protection
- Customise force respawn time
- Customise intermission wait time
- Directional Damage
- Enhanced player model selection - Displays more models at once and each model now has it's own "sub-model",
  ex : ranger/wrack
- Camping Prevention
- 6 Game Modes - Vampire, instagib, double rockets, homing missiles, guided rockets and low gravity
- 7 Game Options - Falling damage, footsteps, fixed f.o.v, self damage, quad factor, knockback and weapon respawn time
- Rail trail type - standard or spiral rail (from coliseum 2)
- Rails can shoot through walls
- There are virtually no cvars to set, everything can be customised or selected from Hellfire Arena's User Interface
- Auto-use holdable item option
- Customise weapon statictics - damage, reload times, ammo, etc
- Lightning Gun type - Chain Lightning or Standard type
- Damage Scale/Multiplier option
- New random bots option & cvar (addrandombot)
- New Load, Save & Reset Settings option
- 5 New Hud Styles to choose from (from qwFix & EliteHud)
- New map rotation option - add map - simplifies the user's work of adding maps to the rotation list !
- New option to change head/body model in model settings menu independently for both FFA/Tourney & CTF/Team games
- Includes 7 ready-made configs to play with - Instagib, Excessive, Fun, Random, Bfg Arena, Flame Arena & Default
- Fixed many bugs in 1.27g point release (missing medals in CTF games, missing voice chat files, etc)
- Added new weapon ranking option to Weapon Options menu
- Added new guided rockets game mode
- Added ingame scoreboard awards and scoreboard scores now shows frags/deaths
- Added new motion tracker to hud options - track your enemies !
- Added bfg type to weapon options - Toggle between the standard / enhanced version of the BFG10k
- Added new flame thrower weapon with option to replace ANY current Quake 3 weapons
- Added new option to weapons configuration menu to allow user to change a projectile's velocity/speed
- Added option to toggle between standard or enhanced weapon selection to hud options
   (only affects hud styles 1->4, hud style 5 always shows the enhanced version)
- Added new option to randomly spawn a flame thrower & flame ammo into any map!
- Added new option to toggle displaying all maps in map selection menu (you can
   now play ctf maps in FFA, ffa only maps in Tournament, etc...)
- Added option to toggle team colored skins has been added to game options
- Added option to enable/disable progressive zooming
- Added frags per hour display in scoreboard
- Added option to toggle crosshair in 3rd person view
- Added grappling hook
- Added option to change splash radius & splash damage of weapons
- Added option to randomly spawn ANY weapon on ANY map
- Added Cam Options menu with New Q3Cam Spectator View
- Added option for individual weapon scoring
- Added Spawn as Spectator & Record Demo option to User Interface
- New Favourite Maps & New Maps in Map Source (users can customise this by editing maps.txt)
- Added New Telefrag Instagib Mode to Game Modes Menu (can be used in non-instagib games!)
- Added 6 Runes (can be disabled)
- Score plums now show attacker's current score

A Complete detailed list of Hellfire Arena's features can be viewed here