There are alot of weapons hidden around in Liberty City in GTA Liberty City Stories. This page lists the locations of the weapons.
Many of these weapons will require some climbing and jumping, or even the use of a Yankee.
Baseball Bat - Can be found at you safehouse, regardless of how many Hidden Packages you've found, or at Hogs'n' Cogs.
Meat Cleaver - Can be found in the middle of the Chinatown Market, Portland.
Chainsaw - Can be found at the backside of the Sawmill on Portland Island.
Knife - Can be found at the top of Marco's Bistro, Portland.
Brass Knuckles - Can be found amongst the ruins of Fort Staunton.
Fireman's Axe - Can be found behind the fire station on Portland Island.
Police Baton - Can be found on any police officer in Liberty City.
Screwdriver - Can be found in an alley near Belleville Park, Staunton Island.
Katana - Can be found in an alley in Bedfort Point, near Phil Cassidy's, Staunton Island.
Hockey Stick - Can be found near the sport's stadium in Aspatria, Staunten Island.
Pistol - Can be found on any police officer in Liberty City, and gangmembers often carry them.
Revolver - Can be found behind the signs at Francis International Airport, Shoreside Vale, and inside the boat when on the mission The Portland Chainsaw Massacre
Pump-shotgun] - Can be found inside any Police Cruiser, atop of the mall in Portland View, Portland, in an alley in Bedford Point, Staunton Island, and by killing Ammu-Nation shop keepers.
Compact-Pump-Shotgun - Can be found at the big building to the east of Belleville Park, Staunton Island, or in the ruins of the warehouse at Callahan Point. Can only be found after the mission The trouble with Triads.
Auto-Shotgun - Can be found
TEC-9 - Can be found at the end of a long alley in Saint Mark's.
Micro SMG - Can be found behind a small "house" under Callahan Bridge, Portland side.
MP5-K - Can be found at a dock on Staunton Island, or it can be found at any Military personal and FBI agents.
AK-47 - Can be found atop of Sex Club Seven, Red Light District, Portland.
M4-A1 - Can be found between to containers, near the road in Torrington, heading towards the Yakuza casino.
Bolt Action Rifle - Can be found under a broken wooden bridge on Shoreside Vale.
Semi-Automatic-Rifle - Can be found at a balcony of a destroyed restaurant in Fort Staunton, Staunton Island.
Grenades - Can be found at the back of a boat docked at Portland Harbor]], Portland.
Molotov Cocktails - Can be found in the ruins of the destroyed casino, The Dolls House, Red Light District, Portland Island.
RC Grenades - Can be found in a pool at one of the big houses in Shoreside Vale, and at a roof of a large building at Cochrane Dam, Shoreside Vale.
Flamethrower - Can be found a roof in Trenton, Portland.
RPG - Can be found under the heading from Staunton Island to Shoreside Vale, Shoreside Vale side.
Minigun - Cant be found, must be bought at Phil's.
M60 - Can be found ontop of a hangar on Francis Intl. Airport