- All maps
Enter 'GiveMeTheMaps' as a case-sensitive code to unlock all maps. Notice: This code cannot be disabled unless your profile is deleted.

- Easy Multiplayer achievements
Begin a Multiplayer game for each of the respective modes, with a one minute time limit and play it by yourself to get the following achievements:

Seek n' Secure Be victorious inner
Multiplayer Master
Team Chaos Be victorious inner
Steal the Sample Be victorious inner
Predator Be victorious inner
Chaos Be victorious inner

- Game references
In some levels, you can find a magazine named 'Gamer Lamer'. The magazine's cover has a mock-up picture of Gordan Freeman from Half-Life. The cover of the magazine reads 'Quarter-Life 2 Amazing New Screenshots! Medal Of Shame, and Broom 3'. These are mockups of Half-Life, Medal Of Honor, and Doom 3.

- Restore health
Enter 'ImJackCarver' as a case-sensitive code.

- Infinite ammunition
Enter 'UnleashHell' as a case-sensitive code.

- Infinite Feral Attacks
Enter 'Bloodlust' as a case-sensitive code.

- Achievements
Do the following things to obtain the corresponding Gamerscore points (1,000 total possible points):

5 Points
Steal the Sample Be victorious inner	Successfully complete a game while ranked in first place in a Multiplayer Steal The Sample match.
Chaos Be victorious inner	Successfully complete an online game in Chaos mode ranked in first position.
Team Chaos Be victorious inner	Successfully complete a game while ranked in first place in an online Team Chaos match.
Predator Be victorious inner	Successfully complete a Multiplayer game in Predator mode ranked in first position.
Seek n' Secure Be victorious inner	Successfully complete a game while ranked in first place in an online Seek n' Secure match.
10 Points
Instincts Rookie	Successfully complete the Instincts story on the Rookie difficulty setting.
Evolution Rookie	Successfully complete the Instincts story on the Rookie difficulty setting.
15 Points
Instincts Hunter	Successfully complete the Expansion story on the Hunter difficulty setting.
Evolution Hunter	Successfully complete the Expansion story on the Hunter difficulty setting.
20 Points
Seek n' Secure Champion	Get ranked first 50 times in Multiplayer Seek n' Secure mode.
Chaos Champion	Get ranked first 50 times in Multiplayer Chaos mode.
Team Chaos Champion	Get ranked first 50 times in Multiplayer Team Chaos mode.
Predator Champion	Get ranked first 50 times in Multiplayer Predator mode.
Steal the Sample Champion	Get ranked first 50 times in Multiplayer Steal the Sample mode.
25 Points
Berserker	Get 10 multikills in any Multiplayer game mode.
30 Points
Evolution Predator	Successfully complete the Expansion story on the Predator difficulty setting.
Stalker	Get 50 Trap kills in any Solo mode.
Multi Head Acquireor	Get 300 headshots in any Multiplayer game mode.
Multiplayer Master	Get first place at least once in all online game modes.
Head Acquireor	Get 100 headshots in any Solo mode.
Multi Stalker	Get 100 traps kills in any Multiplayer game mode.
Explosives Maniac	Get 200 kills with grenades in any Multiplayer game mode.
Multi Feral Warrior	Get 150 Feral Punch kills in any Multiplayer Game Mode.
Road Demon	Get 100 kills by road kills in any Multiplayer game mode.
Feral Warrior	Get 80 Feral Punch kills in any Solo mode.
Instincts Predator	Successfully complete the Instincts story on the Predator difficulty setting.
Shadow Hunter	Get 40 Stealth kills in any Solo mode.
40 Points
Instincts Devourer	Successfully complete the Instincts story on all difficulty settings.
Gamer Addict	Successfully complete the Instincts story and the Evolution story.
Evolution Devourer	Successfully complete the Evolution story on all difficulty settings.
50 Points
Multi Champion	Get ranked first 300 times in all Multiplayer game modes.
Cleaner	Get 1,000 total kills in any Multiplayer game mode.
Gamer Nerd	Successfully complete the Instincts story and the Evolution story on all difficulty settings.
70 Points
Multiplayer über Geek	Play 80 hours in any Multiplayer game mode.
100 Points
Treasure Raider	Find all of Doctor Krieger's lost research dispatched on every map in both stories.

- Feral Attack in the early levels
Enter 'FeralAttack' as a case-sensitive code.

- No reloading
Get two Desert Eagles. Shoot one gun, then just as you reload, shoot the other. One of the guns will constantly reload, and you can keep shooting the other one. Notice: You will not have infinite ammunition.

- Hidden message
At the map editor screen, press LT + RT + LB + RB + X + Y + B + A + click and keep pushed Left Analog-stick + Right Analog-stick to display the French text 'J'avions vu une plane!'.

- Evolution Story mode
Enter 'GiveMeItAll' as a case-sensitive code to unlock Evolution Story mode. Alternately, successfully complete Instincts Story mode to unlock Evolution Story mode.