Resident Evil Umbrella Chronicles (Wii) Weapons Unlock?

[mattdabatt]

anyways i have the game been a while since i played but i cant seem to find the information online to unlock the new weapons? Do i simply get an S rank on all the missions?(bit lame) like one of the weapons i know im missing is the silencer. Thanks

 

[Bloodcypher]

Idk but its awsome game!