Get 5 stars rank in all Mercenaries stages with every characters.
Hunk
Clear Military stage with 4 or more stars rank.
Infinite Rocket Launcher
Beat the game once.
Krauser
Clear Castle stage with 4 or more stars rank.
Leon Special 1
Beat the game once.
Leon Special 2
Beat the Separate Way.
Matilda
Beat the game once.
Mecenaries
Beat the game once.
Movie Browser
Beat the game once.
P.R.L. 412
Beat the game on Professional mode once.
Professional Mode
Beat the game once on the Normal difficulty setting.
Separate Way
Beat the game once.
To kill el gigante(the gaint monster)
Here is a great hint to kill el gigante(the big gaint). Dont waste your precious ammos on him ,Just before you face him directly buy a rocket launcher from a merchant who will be there at the saving point(near typewriter).When you engage with him just aim at him with a rocket launcher and shoot him with that,he will be killed at a single strike.