Trophies, Cheats, and more

Mirrors Edge Secret Trophies:
Sweet Goodbye: When approaching an enemy, jump by them, quick turn, and press attack. Faith will give the enemy a rude British gesture.

Hey, its'a me!: This Mario Brothers task is done by landing atop an enemy, as as Faith's feet touches the enemy, press attack. Jumping is required to give Faith the force needed to end the stomp.

Battlefield Bad Company Cheats:
Unlockable: Kits
Use the in-game cheats menu for these:
Recon Kit (QBU88) - your3mynextt4rget
Special Ops Kit (UZI) - cov3r1ngthecorn3r
Support Kit (M60) - try4ndrunf0rcov3r
USAS12 Shotgun - aw3somef1rep0wer
Unlock FN2000 - h4h4th3r1snoc0d3

Call of Duty: World at War
Unlockable: Zombie Mode
To unlock Zombie Mode, complete Campaign Mode once through in its entirety.

Unlockable: Death Cards
To unlock the Death Cards below, find them on the corresponding mission.
Berserker (Become Berserk) - Breaking Point
Body Armor (Only Headshots Kill Foes) - Ring of Steel
Cold Dead Hands (Enemy Weapons Disappear) - Vendetta
Flak Jacket (Stronger Enemies Against Explosives) - Relentless
Hard Headed (Stronger Enemies Against Bullets) - Little Resistance
Painkiller (Revive Dead Co-Op Teammates) - Blowtorch & Corkscrew
Paintball (Paintball Guns) - Heart of the Reich
Sticks & Stones (Knives & Rocks Only) - Their Land, Their Blood
Suicide King (Explosive Pistol Rounds) - Hard Landing
Thunder (Explosive Headshots) - Semper Fi
Undead Soldier (Enemies Revive Themselves) - Eviction
Vampire (Recharge Health by Killing) - Burn ‘Em Out
Victory (Limits HUD/Friendly Fire) - Downfall

Easter Egg: The Ray Gun
On Little Resistance, as soon as you get to the beach you'll come across four small craters, from right to left along the beach (facing land from the water). You'll have to walk through these in order, from right to left. The largest one is the first you should walk through (on the right) and it is full of water. The second one has water too, but the third is dry. The last has water in it. Stand in this one for a few seconds and look towards the tree line. After about ten seconds, four dog-like lion statues will rise out of the ground (Zoooool!) and you can nab the Ray Gun from one of them. The ghostly voice says "Future Warfare" in Japanese.

Easter Egg: Clan Tag Antics:
Enter the names listed below for your Clan Tag to get the following special text effect:
.... - gives a moving o in your tag
cylc - Multicolored tag
cyln - Makes a red bar through the letters
move - Bouncing tag
rain - Multicolored effect
gold - Gold tag

Rock Band 2
Cheat List:
From the main menu, navigate to "Extras." Go to "Modify Game" and you’ll be able to enter the codes listed below for the desired effect:

Yellow, Blue, Orange, Yellow, Blue, Orange, Yellow, Blue, Orange - Better note detection
Red, Red, Red, Red, Yellow, Yellow, Yellow, Yellow - Play new venues only
Blue, Blue, Red, Red, Yellow, Yellow, Blue, Blue - Remove the note display
Blue, Yellow, Red, Blue, Yellow, Red, Blue, Yellow, Red - Stage Mode
Red, Yellow, Blue, Red, Red, Blue, Blue, Red, Yellow, Blue - Unlock all songs
Blue, Orange, Orange, Blue, Yellow, Blue, Orange, Orange, Blue, Yellow - Unlock all venues

Unlockable: Instruments and Apparel
To unlock the instruments or clothing desired, perform the corresponding actions:
Bomb Bass - Beat the impossible bass challenge
Bone Microphone - Beat Impossible Marithon 2 Challenge
Clear Fender American Deluxe Stratocaster HSS - Join the "Rolling Stone Rock Immortals" list
Clear Microphone - Beat Rock Immortal Setlist in World Tour as Vocal
Glowing Drum Set - Join the "Rolling Stone Rock Immortals" list
Gold Drum Set - Beat the impossible drum challenge
Gold Fender American Deluxe Stratocaster HSS - Beat the "Impossible Guitar Challenge"
Gold Microphone - Beat Imposible Vocal Challenge
Silver Bass - Beat "The Final Band Challenge" on Bass
Silver Drums - Beat "The Final Band Challenge" on Drums
Silver Guitar - Beat "The Final Band Challenge" on Guitar
Silver Microphone - Beat "The Final Band Challenge" on Vocals
The Goat Head guitar - Beat the Impossible Marathon 2 challenge on guitar on any difficulty level.
Ultimate Goth Outfit - Beat the Impossible Drum Challenge
Ultimate Metal Outfit - Beat Imposible Vocal Challenge
Ultimate Metal Outfit - Complete the Vocals Impossible Challenge on any difficulty
Ultimate Punk Outfit - Beat the Impossible Bass Challenge on any difficulty
Ultimate Rock Outfit - Beat the Impossible Guitar Challenge on any difficulty