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Xbox 360 - Dark Sector cheats

Unlock brutal difficulty level:
Complete the game once.

Achievements:
Complete the following achievements to award the indicated amount 
of Xbox Live Gamerscore points. 

Prologue (10 gamerscore points): Finish Chapter 1. 
Exposure (10 gamerscore points): Finish Chapter 2. 
Baggage Claim (10 gamerscore points): Finish Chapter 3. 
Moths To The Flame (10 gamerscore points): Finish Chapter 4. 
The Shipment (10 gamerscore points): Finish Chapter 5. 
The Bait (10 gamerscore points): Finish Chapter 6. 
Industrial Evolution (10 gamerscore points): Finish Chapter 7. 
Unnatural History (10 gamerscore points): Finish Chapter 8. 
Threshold Guardian (10 gamerscore points): Finish Chapter 9. 
The Dark Sector (100 gamerscore points): Finish the Game. 

Dark Sector - Brutal Difficulty (110 gamerscore points): 
Finish the Game on Brutal Difficulty. 

Weaponsmith (10 gamerscore points): 
Apply 5 Upgrades in the Black Market. 

Veteran (30 gamerscore points): 
Score 500 Points in Ranked Infection Games (Multiplayer). 

The Finisher (10 gamerscore points): 
Perform 30 Finishers. 

Skeet Shooter (10 gamerscore points): 
Shoot 10 Projectiles in Mid-flight. 

Sharpshooter (10 gamerscore points): 
Get 30 Headshots. 

Researcher (10 gamerscore points): 
Collect 10 Weapon Upgrades. 

Rebound (15 gamerscore points): 
Kill an Enemy With a Reflected Projectile. 

Master Researcher (15 gamerscore points): 
Pick up all the Weapon Upgrades. 

Jack Frost (10 gamerscore points): 
Kill 30 Frozen Enemies. 

Incinerator (10 gamerscore points): 
Incinerate 30 Enemies. 

Hero of the People (40 gamerscore points): 
Score 2000 Points in Ranked Epidemic Games (Multiplayer). 

Hero (40 gamerscore points): 
Score 2000 Points in Ranked Infection Games (Multiplayer). 

Headhunter (10 gamerscore points): 
Decapitate 30 Enemies. 

Hardball (35 gamerscore points): 
Kill 30 enemies with Power-throw. 

Greed (10 gamerscore points): 
Get at least 50,000 rubles. 

Glory (30 gamerscore points): 
Finish Best Overall in a Ranked Infection Match (Multiplayer). 

Glaive Master (10 gamerscore points): 
Finish a Level by Only Using the Glaive. 

Finesse (40 gamerscore points): 
Kill 30 enemies with Aftertouch. 

Electrician (10 gamerscore points):
Electrocute 30 Enemies. 

Double Decap Latte (15 gamerscore points): 
Obtain Two Decapitations In One Shot. 

Comrade (30 gamerscore points): 
Score 500 Points in Ranked Epidemic Games (Multiplayer). 

Champion (30 gamerscore points): 
Finish Best Overall in a Ranked Epidemic Match (Multiplayer). 

Secret achievements:
Stalker (65 gamerscore points): Unlocked by defeating the Stalker. 
Secret Achievement (85 gamerscore points): Unlocked by defeating Nemisis. 
Jack the Jackal (35 gamerscore points): Took the Jackal for a ride. 
Ghost (35 gamerscore points): Used Shifting to get a finisher. 
Colossus (50 gamerscore points): Unlocked by defeating the Colossus.