Deus Ex features a huge assortment of weapons ranging from throwing knives to rocket launchers and everything in between. You will encounter more weapons than your inventory will hold so choosing which weapons to keep is critical to success.

In Deus Ex, there are five categories of weapons: Heavy, Pistol, Rifle, Low-Tech, and Demolition, this has to do with the skill used for accuracy and damage.

Low-Tech	Riot Prod	The best weapon a stealth player can have. It's always quiet, and can take down most enemies with one charge. Best used when you have, quite literally, closed the distance between you and your target to a point where your bodies are actually touching.
	Crowbar	Never needs ammo though it tends to kill your target. The only problem with the crowbar is that your target will die noisily alerting other guards.
	Baton	Unlike the crowbar, the baton will guarantee a silent non-lethal takedown. However, there is the nasty possibility the target will shrug off the blow and open fire.
	Sword	It will take more space in your inventory, but also deals more damage.
	Dragon's Tooth Sword	A better sword. When combined with a mastered weapon, low-tech and combat strength augmentation are strong enough to destroy security cameras, alarm switches, and turrets.
	Pepper Gun	Once sprayed, causes gas to be released, causing humans and creatures to do nothing for a short time.
	Throwing Knifes	A quiet and quick way of dealing with organic enemies.
	Combat Knife	Small handy knife. Used to open crates and to take down any enemies that arent expecting it.
Pistol	Pistol	A standard 10mm Pistol
	Stealth Pistol	It does less damage, but the built-in silencer is great for silent, ranged takedowns.
	PS20	A small pistol that shoots 1 plasma shot. Can only be used once.
	Mini-Crossbow	A very quiet weapon that can be used with 3 types of darks, plain, tranquilizer and flare darts.
Rifle	Assault Rifle	An automatic machine gun. 2 Types of ammo, shells and 20mm HE rounds which are very handy.
	Sawed Off Shotgun	Strony yet slow loading shotgun
	Sniper Rifle	A powerful sniper rifle. Comes with a scope.
	Assault Shotgun	An automatic shotgun.
Heavy	Flamethrower	Very strong
	GEP Gun	Stands for 'Guided Explosive Projectile'. Homing weapon that locks onto enemies.
	Plasma Rifle	A heavy weapon that shoots plasma.
	LAW	A rocket launcher that can only be used once.
Demolition	Gas Grenades	Toss one into a room to immobilize all targets then finish them off with a GEP rocket or a LAM. Alternately, run past them and choke some damage down.
	Scramble Grenade	A small device that can be attached to walls and become like a proximitiy mine or it can be thrown like a normal grenade. This will cause bots to be locked and unable to do anything for a short time.
	EMP Grenade	A small device that can be attached to walls and become like a proximitiy mine or it can be thrown like a normal grenade. This will cause a Electromagnetic Pulse, putting a stop to any electronice devices that got caught in the blast.
	LAMs	Best used against bots if you can aim it well enough, or if possible, place in proximity mode in the path of the bot, just like in training. Also a good way to open locked chests, cabinets, and doors.

Weapon Mods:

Weapon mods are little devices that improve the functions of a specific weapon. Weapons are limited to what mods can be installed. You can also add multiple of the same mod to stack the effects.

Accuracy	Increases the accuracy of the following weapons; Assault Rifle, Mini-Crossbow, Pistol, Plasma Gun, Sniper Rifle, Stealth Pistol.
Clip	Increases the ammo capacity of the following weapons; Assault Rifle, Assault Shotgun, Sawed-off Shotgun, Plasma Rifle, Pistol, Sniper Rilfe, Stealth Pistol.
Laser	Adds a laser pointer to the following weapons; Assault Rifle, Plasma Rifle, Pistol, Stealth Pistol, Sniper Rifle, Mini-Crossbow, Plasma. Able to turn on and off.
Range	Increases the range of the weapon for the following weapons; Assault Rifle, Plasma Rifle, Stealth Pistol, Pistol, Mini-Crossbow, Sniper Rifle, GEP, Flamethrower.
Recoil	Reduces the recoil of the weapon for the following weapons; Assault Rifle, Assault Shotgun, Sawed-off Shotgun, Plasma Rifle, Pistol.
Reload	Reduces the reload time of the following weapons; Assault Rifle, Assault Shotgun, Flamethower, GEP, Mini-crossbow, Pistol, Plasma Rifle, Sawed-off Shotgun, Stealth Pistol, Sniper Rilfe.
Scope	Adds a scope to the weapon to the following weapons; Plasma Rifle, Stealth Pistol, Pistol, Mini-Crossbow, GEP.
Silencer	Quiets the noise of the firing of these weapons; Assault Rifle, Sniper Rifle.