.50 Cal Machine for Survivor mode
Collect the .50 Cal gun part in every level to unlock the gun for survivor mode.
Unlockable How to Unlock .50 Cal Machine Gun Collect the .50 Cal gun part in each level.
Beat the game once to unlock Hard mode
Unlockable How to Unlock Hard Mode Beat the game once
Beat the game once and in hard mode a plasma rifle can be picked up at the body that must be examined in the first level.
Unlockable How to Unlock Plasma Rifle Beat the game once
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