Quake 4 cheats

Cheat Unlock Codes
While playing the game press the "back" button to bring up the objectives window, then quickly press the following buttons.
(You will need to be quick due to the fact that pressing the back button does not pause the game).

Cheat Code: Get all
Buttons to Press: Up, Up, Down, Down, Left, Right, Left, Right, B, A

Cheat Code : Never die (your health does not drop below 1 Point, you can still die due to falling)
Buttons to Press: Down, Up, Down, Down, Up, Right, Left, Right, Y, X, X, A

Cheat Code : Full health refill
Buttons to Press: B, A, B, A, Up, Up, Down, X

Cheat Code : Full ammo refill on all weapons
Buttons to Press: B, A, X, Y, Left, Right, Left

 

Gamepoints for Xbox Live (Single player mode)

Unlock achievement: Ballistics Expert - 15 points
How to Unlock: Complete a level using only the rocket launcher

Unlock achievement: Blaster Master - 15 points
How to Unlock: Complete a level using only the blaster

Unlock achievement: Blazing Buckshot -15 points
How to Unlock: Complete a level using only the shotgun

Unlock achievement: Corporal-Act 1 - 25 points
How to Unlock: Complete Act 1 with rank of Corporal

Unlock achievement: Corporal-Act 1 - 25 points
How to Unlock: Complete Acts 1 and 2 with rank of Corporal

Unlock achievement: Corporal-Defeated the Strogg - 30 points
How to Unlock: Complete the game with rank of Corporal

Unlock achievement: Enlightening - 15 points
How to Unlock: Complete a level using only the lightning gun

Unlock achievement: Full Arsenal - 20 points
How to Unlock: Landed a shot from every weapon

Unlock achievement: Galactic Order of Heroism - 20 points
How to Unlock: Finish the level with helping the Raven Squad

Unlock achievement: General-Act 1 - 25 points
How to Unlock: Complete Act 1 with rank of General

Unlock achievement: General-Act 2 - 25 points
How to Unlock: Complete Act 2 with rank of General

Unlock achievement: General-Defeated the Strogg - 30 points
How to Unlock: Complete the game with rank of General

Unlock achievement: Hyperactive - 15 points
How to Unlock: Complete a level using only the hyper-blaster

Unlock achievement: Lieutenant-Act 1 - 25 points
How to Unlock: Complete Act 1 with rank of Lieutenant

Unlock achievement: Lieutenant-Act 2 - 25 points
How to Unlock: Complete Acts 1 and 2 with rank of Lieutenant

Unlock achievement: Lieutenant-Defeated the Strogg - 30 points
How to Unlock: Complete the game with rank of Lieutenant

Unlock achievement: Pineapple King - 15 points
How to Unlock: Complete a level using only the grenade launcher

Unlock achievement: Private-Act 1 - 15 points
How to Unlock: Complete Act 1 with rank of Private

Unlock achievement: Private-Act 2 - 20 points
How to Unlock: Complete Acts 1 and 2 with rank of Private

Unlock achievement: Private-Defeated the Strogg - 25 points
How to Unlock: Complete the game with rank of Private

Unlock achievement: Sky Marshall's Medal of Valor - 20 points
How to Unlock: Rescue PVT Lanier of Eagle Squad

Unlock achievement: Solar Star of Courage - 20 points
How to Unlock: Finish the level with helping the Viper Squad

Unlock achievement: The Dark Lord - 15 points
How to Unlock: Complete a level using only the dark matter gun

Unlock achievement: The Machine - 15 points
How to Unlock: Complete a level using only the machine gun

Unlock achievement: The Sniper - 15 points
How to Unlock: Complete a level using only the railgun

Unlock achievement: Tooth and Nail - 15 points
How to Unlock: Complete a level using only the nailgun

Unlock achievement: Untouchable - 10 points
How to Unlock: Complete level with no damage taken

 

Gamepoints for Xbox Live (Multiplayer mode)

Unlock achievement: Basic Training - 5 points
How to Unlock: Play over 100 matches

Unlock achievement: Best Impression - 10 points
How to Unlock: Get over 250 impressives

Unlock achievement: Bronze Flag - 5 points
How to Unlock: Get over 100 captures

Unlock achievement: Combat Veteran - 25 points
How to Unlock: Play over 1,000 matches

Unlock achievement: Corporal-Multiplayer - 10 points
How to Unlock: Get over 500 Win points

Unlock achievement: Defender - 10 points
How to Unlock: Get over 250 Defense awards

Unlock achievement: First tour of duty - 10 points
How to Unlock: Play over 500 matches

Unlock achievement: General-Multiplayer - 50 points
How to Unlock: Get over 5,000 Win points

Unlock achievement: Gold Flag - 25 points
How to Unlock: Get over 1,000 captures

Unlock achievement: Golden Gauntlet - 20 points
How to Unlock: Humiliate over 250 players

Unlock achievement: Guts but no Glory - 10 points
How to Unlock: Over 100 Assists

Unlock achievement: Lieutenant-Multiplayer - 25 opints
How to Unlock: Get over 1,000 Win points

Unlock achievement: Number 1 - 20 points
How to Unlock: Reach number one on the All Gametypes ranked leader board

Unlock achievement: Perfect Win - 5 points
How to Unlock: Win a match without dying

Unlock achievement: Private-Multiplayer - 5 points
How to Unlock: Get over 100 Win points

Unlock achievement: Raven Squad - 50 points
How to Unlock: Get over 5,000 frags

Unlock achievement: Rhino Squad - 75 points
How to Unlock: Get over 10,000 frags

Unlock achievement: Seasoned Warrior - 50 points
How to Unlock: Play over 5,000 matches

Unlock achievement: Silver Flag - 10 points
How to Unlock: Get over 500 captures

Unlock achievement: Viper Squad - 5 points
How to Unlock: Get over 100 frags

Unlock achievement: Warthog Squad - 10 points
How to Unlock: Get over 500 frags

Unlock achievement: You Excellency - 10 points
How to Unlock: Get over 500 Excellents