Unlockable Weapons
     Clear these respective levels to unlock them.

Unlockable:              How to Unlock:

Hand Cannon              Exterior Hospital

Throwing Disc            Forest (Route 2: Industrial)

Shoulder Cannon 
(Single and Dual)        From the start (Single) and after upgrading (Dual)

Shuriken                 Cemetery (Route 3: Suburban)

Spear                    The Crash Site (Route 1: Underground)