Metal Gear Solid 4: Guns of the Patriots Unlockables

Unlockable Weapons
You can unlock various weapons by completing various modes and getting various emblems.
UnlockableHow to unlock
Desert Eagle Long BarrelGet the Fox Emblem.
Patriot Future Assault Weapon Successfully complete the game with a "Big Boss" rank. This weapon has infinite ammunition.
Race Gun pistolSuccessfully complete the game in Single Player mode.
Solar GunCollect the five statues (the four Battle Beauties and Frog Soldier/Haven Troopers) with non-lethal means on their respective idols.
Thor 45-70Get the Fox Hound Emblem.
World War I pistolGet the Hound Emblem.
Desert EagleEither Buy it in Act 2 for $5000 or get it from Dwarf Gecko