Alpha Protocol
Veteran class:
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Successfully complete the game under the Recruit class to unlock the
Veteran class, which starts with three skill points in every category
and "Veteran" dialog options.
Bonus weapons:
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Successfully complete the indicated task to unlock the corresponding
special weapon:
Brayko's SMGs: Kill Brayko.
Brayko's stereo: Spare Brayko.
Gold assault rifle: Sneak up on Al Samad Lieutenant without any
alarms being sounded.
Gold SMG: Assassinate Brajka.
Marburg's pistol: Bait Marburg into fighting to the death in the museum.
Omen's shotgun: Kill Omen Deng.
Refilling endurance meter:
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When you have taken endurance damage, go to the inventory screen, and
select "Armor". Re-equip your armor (highlight armor and press X) to
completely refill your endurance meter. Repeat this as many times as
desired.
Easy ammunition in "Investigate Marburg's Villa" mission:
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At the end of the mission, you can find two ammo collectibles in the
garden on the north and south sides. They will respawn after you move
back to the doors.
Easy Boss kills:
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Get the pistol up to the advanced chain shot level. When a Boss sticks
their head out, do a five shot chain shot to kill it instantly.