Hand-to-Hand

Attack Moves - A step up from fist-fighting, the basic form of self-defense/attack is a series of moves that can be upgraded throughout the game. This includes kicking, special attack moves, and punching.

Brass Knuckles - An addition to the attack moves, brass knuckles inflict more damage when punching an enemy.

Poolstick - Kept after playing pool at any of the bars throughout San Andreas. Does more damage than the brass knuckles.

Baseball Bat - Nothing beats a good ol' baseball bat when there's nothing else around to fight with. Inflicts more damage to enemies than brass knuckles.

Golf Club - A step up from the nightstick, the golf club is a good form of defense for attacks from further away. Does not include plaid pants and sweatervest.

Shovel - With a larger face than the golf club, the shovel is the perfect way to take out enemies and hide the evidence (although you can't actually dig graves).

Knife - More deadly than the shovel, the knife is a good concealed weapon to carry to attack enemies without drawing attention. Can be used to sneak attack enemies.

Katana - The best melee weapon, the katana can behead enemies with a single stroke

Miscellaneous Handheld

Spraypaint - A can of green paint that can be used to blind enemies. In large amounts, it can be deadly.

Fire Extinguisher - Another interesting way to take down enemies, the fire extinguisher can be used to get rid of fires and/or rival gang members.

Flowers - A quite ironic form of attack, flowers can be used to beat an enemy to death.

Dildo - Perhaps the most embarrassing way to be killed, the dildo can be used the same way as the pool cue.

Pistols

9mm - Basic pistol carried by most gang members and all cops. It has a decent rate of fire and has a 17-round clip.

Silenced 9mm - The stealthiest way to take out enemies without alerting the cops. While not as powerful as the 9mm, the silenced pistol is perfect for sneak attacks.

Desert Eagle - The most powerful semi-auto pistol, the desert eagle can take down enemies with one shot.

SMGs

Tec-9 - The standard fully-automatic handgun, the Tec-9 is carried by gang members. Can be used for drive-bys, as can all SMGs.

Micro SMG - A step up from the Tec-9, the micro SMG has a slightly greater rate of fire and accuracy. Two micro SMGs can be carried at once.

SMG - The most powerful of the submachine guns, the SMG holds a 30-round clip and can take down more enemies than any of the other SMGs

Shotguns

Shotgun - The basic shotgun that allows multiple enemies within close proximity to be taken down. Pump-action, single shot. Can be found in cop cars.

Sawnoff Shotgun - As the name states, the sawnoff is a shotgun with the barrel cut off. Holds two shots and two can be carried at once.

Combat Shotgun - A semi-automatic shogun, the combat shotgun is the deadliest of all shotguns and can hold 7 shots.

Standard Rifles

Rifle - A basic one-shot hunting rifle that is fairly accurate, even without a scope.

Sniper Rifle - Equipped with a scope, the sniper rifle is deadly accurate and can take down enemies with one shot.

Assault Rifles

AK-47 - The classic assault rifle that originated in Russia in 1947. Has mediocre rate of fire and accuracy.

M4 - An accurate rapid-fire assault rifle, the M4 fires quicker and more accurately than the AK-47 and is equipped with a 50-round clip.

Heavy Artillery

Flamethrower - Just as the name states, a weapon that can burn anything it is aimed at. Better for short range usage.

Minigun - Back from Vice City, this not-so-mini belt fed weapon fires a 500-round clip and can essentially destroy anything in its path.

Rocket Launcher - The most powerful weapon, the rocket launcher can take down anything from groups of enemies to planes (if aimed properly). A heat seeking version is available.

Thrown

Teargas - The best way to control a crowd, teargas is perfect for disabling groups of enemies. Inflicts a minor amound of damage but renders most enemies defenseless for short periods of time.

Molotov Cocktail - The classic gasoline-in-a-bottle grenade, the molotov cocktail is great for long-range fire attacks on groups of enemies.

Grenade - Just as expected, a thrown explosive that can take down groups of enemies and vehicles.

Remote Explosive - A satchel charge explosive, the remote explosive is perfect way to take down enemies on the run.

Worn

Night Vision Goggles - The best way to see enemies when they can't see you. Can be used for sneak attacks, even from head-on.

Infrared Goggles - Infrared goggles sense heat and can make any object emitting heat visible in the dark or low-visibility areas.