Press Escape to access the 'Pause' menu and enter the follwowing codes to unlock the corresponding.

Unlock $5000:
Cuneo

Unlock Full Ammo:
Stracci

Full Health:
Corleone

Unlock Movies:
Tattaglia


Unlock Film Clips
To unlock the following film clips complete the corresponding mission

Unlock 'Carlo Goes For A Ride' Clip:
Complete 'It's Only Business' Mission

Unlock 'Carlo Learns A Lesson' Clip:
Complete 'Sonny's War' Mission

Unlock 'Five Shots' Clip:
Complete 'The Don is Dead' Mission

Unlock 'Good Morning Mr. Woltz' Clip:
Collect 70 Film Reels

Unlock 'Johnny Fontane' Clip:
Collect 10 Film Reels

Unlock 'Luca's Demise' Clip:
Collect 30 Film Reels

Unlock Mr. Bonasera Clip:
Complete 'The Enforcer' Mission

Unlock 'Regarding Sollozzo' Clip:
Complete 'The Alley' Mission

Unlock 'Whack Paulie' Clip:
Collect 55 Film Reels

Unlock 'Sorry Sally' Clip:
Collect 100 Film Reels

Unlock 'The Don Is Dead' Clip:
Collect 40 Film Reels

Unlock 'The Don's Demise' Clip:
Complete 'Order To Kill' Mission

Unlock 'Trigger Too Tight' Clip:
Complete 'Horseplay' Mission

Unlock Sonny And Tom Argue Again Clip:
Complete 'Fireworks' Mission

Unlock 'Sonny And Tom Disagree' Clip:
Complete 'Intensive Care' Mission

Unlock 'Sonny At The Tollbooth' Clip:
Collect 85 Film Reels

Unlock 'The Baptism' Clip:
Complete 'Baptism By Fire' Mission

Unlock 'Spoiled Guinea Brat' Clip:
Complete 'The Silent Witness' Mission

Unlock 'Mr. Woltz Clip':
Complete 'Death To The Traitor' Mission

Unlock 'Sicilian Sign' Clip:
Complete 'Sleeping With The Fishes' Mission

Unlock 'Are You Ready To Do Me This Favor?' Clip:
Complete 'Change Of Plans' Mission

Unlock 'Don Sends Luca On An Errand' Clip:
Collect 20 Film Reels

Unlock 'Mattresses Montage; Clip:
Complete 'A Recipe for Revenge' Mission

Unlock 'Meeting With Sollozzo' Clip
Complete 'A Grave Situation' Mission