Disaster: Day of Crisis Cheats

Extra costumes
To unlock additional costumes, complete various tasks and find secret items in specific levels.

Earthquake: Find the secret item in Port Alex
Fire: Find the secret item in Port Alex
Heavy Rain: Complete the game on any difficulty
Rescuer: Complete the game on any difficulty
Tsunami: Find the secret item on board the Ferry

Secret Weapons
Most weapons are unlocked by buying them or earning them in Shooting Galleries - However, there's a few extra ones for completing certain tasks.

Deep Impact (Gregory's Assault Rifle): Shoot down 10 grenades during the battle with Gregory before killing him
Immolator (Major Evans' Handgun): Shoot down 10 knives during the first battle with Evans before defeating him
Twister (Colonel Haynes' Shotgun): Complete the game on any difficulty
Volcano (Shadow Mercenary's Rocket Launcher): Shoot down 10 missiles during the battle with the chopper on Mt. Rosalia before defeating it

Unlockables
Artwork Gallery: Complete the game on any difficulty
Extra Disaster Files: Complete the game on any difficulty
Final Shooting Gallery: Complete the game on any difficulty
Movie Gallery and Alternate Ending: Complete the game on any difficulty