IF You Want This To Work, You'll Need sv_cheats 1..
okay.. it depends..

if you want to earn achievements, do
sv_cheats 1; give weapon_name; sv_cheats 0;

if you want to just use the guns
sv_cheats 1
then
give weapon_name

yeah that simple.

This is a (Mostly Finished? And Rough) List of Every Gun in This Mod!

Main Guns

You Find These Guns in The Game, in It's Story.
Unlike in EZ:2, It's actually Pretty hard to find their names.
Im also gonna Do This Now
weapon_example
(IRL Name \ Ingame Name)
Their also in rough order of when you find them ingame!

weapon_mapcase
(Notebook \ Map Case)
weapon_stunstick
(Stun baton \ Stunstick)
weapon_pistol
(USP Pistol \ 9mm Pistol)
weapon_smg1
(HK MP7 \ Submachine Gun)
weapon_shotgun
(SPAS-12 \ Shotgun)
weapon_frag
(HL2 Grenade \ Grenade)
weapon_handgren
(40MM M406 Grenade \ Grenade For Launcher)
weapon_adot
(HL:A Health Injector \ Health Injection)
weapon_annabelle
(Mosin Nagant With 91/30 PU Scope \ Sniper Rifle)
weapon_356
(Colt Python \ Officer's Revolver .357)
weapon_glauncher
(M79 Grenade Launcher \ Grenade Launcher)
weapon_bugbottle
(Bottle \ Bug Bait)
weapon_physcannon
(??? \ Magnet Pusher)
weapon_ar2
(OSIPR \ Combine Pulse Assault Rifle)
weapon_ar1m1
(AK-74 With GP-25 \ Pre-War Assault Rifle + Grenade Launcher)

I Want That Gun!

Unlike in EZ:2, Which Only had 2 Weapons you can see but Never get. This Game Has A LOT MORE!

weapon_357
(Mosin Nagant \ Scope-Less Rifle)
weapon_sos
(Break Action Sawed Off Shotgun \ Sawed-Off Shotgun)
weapon_smg2
(MP5SD \ Pre-War Submachine Gun)
weapon_wrench2
(Pipe Wrench \ Pipe Wrench)
weapon_alyxgun
(Alyx Gun in SMG Format \ 9mm SMG Rare and Pre-War)
weapon_rpg
(Makeshift RPG \ RPG)
weapon_crossbow
(HL2 Crossbow \ Crossbow)
weapon_ar1
(AK-74 / Pre-War Assault Rifle)
weapon_alyxgun_s
(Alyx Gun in SMG Format + Suppressor \ 9mm SMG Rare and Pre-War + Silencer)

Hey Buddy, i think you dropped this back in Aperture!

The Weapons in the Bonus Map, Incident in Aperture, This DOES Repeat Some Weapons

weapon_wrench
(Claw Hammer \ Hammer)
weapon_smg2
(MP5SD \ Pre-War Submachine Gun)

Unused Yet Functional

My favourite of Mods. To See what Never was used, But still remain!

weapon_crowbar
(Makeshift Blade \ Axe from Scrap)
weapon_bugbait
(HL2 Bugbait \ Bugged Bait)
weapon_flaregun
(Flare Gun \ Flare Gun)

Useful Commands

Here's Some useful stuff!

sv_cheats 1; ent_create player_weaponstrip; sv_cheats 0;
sv_cheats 1; ent_fire player_weaponstrip Strip; sv_cheats 0;
Do The first command then the 2nd one, this WIPES all your weaponry!

sv_cheats 1; givecurrentammo; sv_cheats 0;
gives max ammo for your current weapon

sv_cheats 1; impulse 116; sv_cheats 0;
Gives you ALL Weapons in the Mod

sv_cheats 1; impulse 101; sv_cheats 0;
Gives you The Standard HL2 Kit, Look up the Command if you Don't Understand.

ent_remove *weapon_name*
Removes the specific weapon named, use the weapons above to see what is what!

So, I Think we Actually got all of em Now.
I Still Have Literally No Idea what Im doing
So.. Uh.. *shrugs*

Currently we need to find:

Anything That's Left in The Game Files I Guess???

===
I probably couldn't do this without help, thank these fellas.

Aperture Science Prototype XR7
(Found AK-74 With GP-25, Alyx Gun in SMG Format + Suppressor, Bug Bait But Bottle, Syringe, TouchBang, Map, and The Revolver)

Oxygen
(Informed me of Impulse 116, which got me the flare gun)

michka.tmv
(Found Sawed Off Shotgun)

MiningJack777
(Shared How To Find Gun Names Using weapon_showproficency, which I used to find the flare gun's name)

JohnRDVSMarston
(Found Scoped Mosin)

Aullen Kessler
(Corrected me on The AK, Found AK-74 Without Underbarrel GL)

===
Im on a Goal to Catalogue every Weapon in HL2 Mods, Because I can.

HELP WANTED IN OTHER GUIDES OF MINE!

Swelter: You Are Here!
Snowdrop Escape: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2999099354
EZ:2: https://steamhost.cn/steamcommunity_com/sharedfiles/filedetails/?id=2896211769

More To Come!