Unreal Tournament 3 - Platform: Xbox 360

Play as Alanna (Necris):
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At the custom character screen, press Y, then enter "phayder" as a code to 
unlock Alanna (Necris).

Play as Ariel (Iron Clad):
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At the custom character screen, press Y, then enter "jihan" as a code to unlock 
Ariel (Iron Clad).

Bonus characters:
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Successfully complete the indicated task to unlock the corresponding character:

Lauren: Always select the second choice for all missions. Kill Lauren in 
Deathmatch in Chapter 2 of Campaign mode. Lauren will eventually become 
unlocked after a subsequent Deathmatch in that chapter.
Scythe: Always select the second choice for all missions. Kill Scythe in 
Deathmatch in Chapter 4 of Campaign mode. Scythe will eventually become 
unlocked after a subsequent Deathmatch in that chapter.
Matrix: Always select the second choice for all missions. Kill Matrix in 
Deathmatch in Chapter 3 of Campaign mode. Matrix will become unlocked after a 
side mission in Chapter 3 in that chapter.
Akasha: Kill Akasha in the final mission.
Loque: Unlocked after a Capture The Flag match in Chapter 5.
Damian: Unlocked in Chapter 4 of Campagin mode.
Kragoth: Unlocked in Chapter 4 of Campagin mode.
Malakai: Unlocked in Chapter 4 of Campagin mode.

Easy Damage Amplification:
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In the "Heatray" level in Multiplayer Deathmatch mode, after the Dark Walker 
drops, destroy it to get a Damage Amplification.

Achievements:
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Accomplish the indicated achievement to get the corresponding number of 
Gamerscore points:

Lock and Load (10 points): Complete Chapter 1. 
Soldier's blood (30 points): Complete Chapter 2. 
Does not compute (30 points): Complete Chapter 3. 
Not in Kansas any more (30 points): Complete Chapter 4. 
I'm not on a holy war (60 points): Defeat Akasha and complete the campaign. 
Just business (30 points): Complete Chapter 2 in Insane. 
Bag of bolts (30 points): Complete Chapter 3 in Insane. 
Open war (30 points): Complete Chapter 4 in Insane. 
Fear the Reaper (60 points): Defeat Akasha and complete the campaign in 
Insane. 
I need some backup (10 points): Complete 1 mission in co-op. 
Got your back (20 points): Complete 10 missions in co-op. 
Thanks to all the little people (40 points): Complete a campaign in co-op. 
I see how it is (10 points): Complete an Instant Action match in every game 
mode. 
Untouchable (20 points): Reach 20 kills against a god-like bot in instant 
action without dying. 
Like the back of my hand (40 points): Collect every power up on every map. 
Spice of life (20 points): Play a match with every mutator, using only 1 per 
match. 
Brain Surgeon (10 points): Get the "Head Hunter" award in 10 matches. 
Don't taze me bro! (10 points): Get the "Combo King" award in 10 matches. 
Goo God (10 points): Get the "Biohazard" award in 10 matches. 
Pistolero (10 points): Get the "Gun Slinger" award in 10 matches. 
Shard-o-matic (10 points): Get the "Blue Streak" award in 10 matches. 
Hammerhead (10 points): Get the "JackHammer" award in 10 matches. 
Strongest Link (10 points): Get the "Shaft Master" award in 10 matches. 
Have a nice day! (20 points): Get the "Rocket Scientist" award in 10 matches 
and "Flak Master" award in 10 matches. 
Big Game Hunter (10 points): Get the "Big Game Hunter" award in 10 matches. 
Armadillo (10 points): Get the "Roadkill" award in 10 matches 
Jack of all trades (10 points): Kill an enemy with every vehicle (except 
hoverboard). 
Ace (10 points): Get the "Top Gun" award in 20 matches. 
Deathwish (10 points): Get "Bullseye" (self-destruct to destroy an enemy) 
award in 20 matches. 
Seeing Red (10 points): Have over 20 minutes of "Berserk Time". 
Never Saw it Coming (10 points): Have over 20 minutes of "Invisibility Time". 
Survival of the fittest (10 points): Have over 10 minutes of "Invulnerable 
Time". 
Delivering the Hurt (10 points): Have over 20 minutes of "UDamage Time". 
Hat trick (20 points): Achieve a Hat Trick in 10 CTF or VCTF matches. 
Being a Hero (10 points): Return 100 Orbs in Warfare matches. 
Flag waver (20 points): Completed 100 CTF matches played to at least 3 
captures. 
Thirty minutes or less (20 points): Complete 100 VCTF matches played to at 
least 3 captures. 
Paint the town red (20 points): Complete 100 Deathmatch or Duel matches played 
to at least 20 kills. 
Connect the dots (20 points): Complete 100 Warfare matches played to at least 
3 points. 
Serial killer (20 points): Get the "Killing Spree" award in 20 matches. 
Sir Slays a Lot (20 points): Get the "Monster Kill" award in 20 matches. 
Killjoy (10 points): End sprees in 20 matches. 
Off to a good start (10 points): Get the "First Blood" award in 40 matches. 
Lets get it on (20 points): Complete a multiplayer match in every game type. 
Around the World (20 points): Win a multiplayer match on every map. 
Get a life… (50 points): Get 200 kills in multiplayer on 50 different days. 
Just warming up (10 points): Finish playing a "Versus" Ranked match. 
Winning is the only thing (10 points): Finish with the highest points in a 
Ranked match. 
Equal opportunity destroyer (20 points): Win a Ranked match in every game 
type. 
Ranked Champion (50 points): Win 500 Ranked matches.