Mega Melee Damage:
     Get  the Machine trophy by defeating the Machine Boss, then press
Down, Down, R1, R1, Up, X, Up, Circle.

Unlimited Life:
     Get  the  Warrior  trophy by defeating all enemies in the Midtown
level, then press Right, Right, Right, X, Up, Triangle, Up, Square.

Monster Spawning:
     Get  the  Werewolf  trophy  by defeating the Werewolf, then press
Square, Square, Circle, Circle, Triangle, L1, L1.

Tougher Monsters:
     Get the Team Up trophy by beating the game with two players, then
press Square, Square, Triangle, Square, L2, L2, Up, Down.

Enable Cheats:
     Get  the  Nephrack trophy by beating the game, then press Circle,
Square, Triangle, X, L1, L1, Left, Left.

All Weapons:
     Get the Looter Trophy by collecting all silver pieces, then press
Square, X, Circle, X, Up, Down, Up, Down.

Improve Edges:
     Beat the game, then press L1, L1, Circle, Circle, Down, Down, Up,
Down.

No Conviction Cost For Edges:
     Get  the  Life  Saver trophy by saving all Innocents in the lower
part  of  the Prison Hospital level, then press L2, Up, X, Up, Square,
Down, Down.

Max Health:
     Get the Pit Fighter trophy by killing all enemies in the Downtown
level  with  the starting melee weapon, then press Triangle, Triangle,
Circle, Circle, Square, L1, Square, R1.

Max Ammo:
     Get  the  Gun Bunny trophy by killing all enemies in the Downtown
level with the starting ranged weapon, then press Right, Right, Right,
Right, Up, Down, Up, Down.

Unlimited Ammo:
     Get  the  Rogue Hunter trophy by defeating the Rogue Hunter, then
press X, Triangle, Circle, Square, Triangle, Up, Down, Down.