Unlock Weapons:
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Spear – Finish The Crash Site [Route 1: Underground] level.
Throwing Disc – Finish Forest [Route 2: Industrial] level.
Shuriken – Finish Cemetery [Route 3: Suburban] level.
Hand Cannon – Finish Exterior Hospital level.
Shoulder Cannon [Single and Dual] – From the start [Single] and after upgrading [Dual].