All shop items:
Press Down(4), Up, Left, Right(2) at the PDA factions screen.
Press Up, Down, Up, Down, Left, Right, Left, Right at the PDA
Mafia Heavy skin:
Press Left(2), Right(2), Down, Up, Down, Up at the PDA factions
Hans Solo skin:
Press Left(2), Right(2), Up, Down, Up(2) at the PDA factions
screen. Alternately, collect 110 Blueprint bounties.
Indiana Jones skin:
Collect 20 National Treasure bounties.
Verify all the Cards (Number Cards, Face Cards, and Aces) to unlock
a secret crate. This crate contains three different super-powered
weapons: The Street Sweeper, Pocket Artillery, and the ultimate
weapon, the Portable Airstrike.
Playground Of Destruction mode:
Successfully complete the game, then verify General Song (the Ace of
Spades). Save the game when prompted. Load that saved game to start
the game again with all money and support items previously collected.