Resident Evil 4 HD Cheats

Unlockable Outfits in The Mercenaries
On the character select screen for The Mercenaries hold the following buttons while choosing the following characters.

Ada with Assignment Ada outfit: Hold RB and press A
Ada with Separate Ways outfit: Hold Y and press A
Leon with Gangster outfit: Hold Y and RB then press A
Leon with jacket: Hold Y and press A
Leon with RPD outfit (RE2): Hold RB and press A

Achievements
Complete each achievement to receive the allotted gamerscore.
A Bloodline Severed (50): Defeat the village chief in battle.
A Heart of Steel (150): Clear the game on the highest difficulty.
A Rock and a Hard Place (50): Outmaneuver the rampaging beast, El Gigante.
A Terrifying Assassin (150): Turn the tables on Verdugo, the right hand of Salazar.
Do Not Shoot the Water! (50): Summon the master of the lake. Don't rock the boat.
It Begins With a Ring (50): Ring the mysterious bell. What happens after that, is up to you.
Secure the Ballistics (50): Rescue the president's daughter, Ashley. Afterwards, the real fun begins.
The Castellan Falls (50): Defeat Salazar, and make your escape from the castle.
The S Stands for Stylish!! (100): Acquire all of the costumes in the game.
The Ties That Bind (50): Defeat Krauser, your former partner, in battle.
We're Going Home (100): Defeat Saddler in battle, and escape from the nightmare.
What Are They Worth? (150): Acquire all of the bottle caps in the game.