Complete the indicated task to unlock the corresponding special weapon, which have unlimited ammunition and do not degrade.

Weapon	How to unlock
10mm submachine gun	Complete Sidequest #14, "Map To Psychic Spot A".
12Ga shotgun CQB	Complete Sidequest #15, "Map To Psychic Spot B".
Axe	Re-enter the Sheriff Department Other World.
Chainsaw	Re-enter the Harry's Mansion Other World.
Grass Cutter	Re-enter the Community Center Other World.
Light Sword	Complete Sidequest #39, "Top Collector".
RPG	Complete Sidequest #16, "Map To Psychic Spot C".
Wesley Special	Complete Sidequest #50, "Ghost House Treasure".
Wrench	Complete Sidequest #29, "Engagement Ring".