New weapon added: PP-19 Vityaz
- AK platform based SMG with similar performance to the MP5. Can be converted to fire 5.45mm ammo to turn it into the AEK-971 assault rifle. Available for $1750 in Horde shop, takes up 5 weight slots, and can be equipped by Survivor, Assault, Heavy, and Medic. Only Assault can convert the weapon into the AEK-971 for balancing reasons. When converted it deals the lowest damage out of all the assault rifles however.
- Can now purchase Osprey suppressor in shop for shotguns
- Deft Hands perk available to purchase in shop; added reload speed bonus to incentivize usage on bolt action weapons.
- decreased close range damage on MP5A3 (Horde) from 33 -> 31
- decreased close and far range damage on UMP45 (Horde); previously 36-29 damage, now 35-24 damage
- fixed not being able to equip the Carry Handle sights to the M4A1 (Horde)
- reduced firing speed penalty for SCAR-20 SSR barrel and G3 SG1 barrel
- increased firing speed penalty for AKM Marksman barrel
- fixed Crowbar and Stunstick (Horde) causing errors due to their weapon icons in the HUD
- adjusted viewmodels for Crowbar and Stunstick (Horde) and iron sights for .357, 9mm, and Medic 9mm pistols (Horde)
- updated suppressed AUG sound
- introduced viewmodel lagger; due to the update to ArcCW, viewmodels became static when aiming, looking like an image pasted over your view rather than a realistic point of aiming. This separate lua script looks to re-enable this feature that was previously a part of the weapon base that got disabled in the base's update. This script also allows clientside customization through the Options menu so you can alter its values or turn it off completely if you prefer the static view.

- separated ArcCW GSO weapons between Sandbox and Horde; in sandbox and other PvP modes where they are accessible (eg. Gun Game), the weapons will deal less damage to players to combat fast times to kill, while in Horde the weapons will continue to do the same damage they have since before this separation. the weapons separated to Horde are now designated with the "arc_horde" prefix and will only be accessible in that mode. any future weapon damage profile changes will no longer affect both modes unless specified
- complete overhaul of the GSO weapons firing sounds to provide easier foundation to update any sounds or add new ones in the future, gives more weapons unique firing sounds and fixes some weapon sound clipping; AUG is now able to use its intended firing sound due to this change
- updated reload sfx of M249 and Negev
- fixed M249 (Horde) having clip size of 100 instead of 150 with default belt
- fixed not being able to purchase barrel upgrades for the R8 revolver, AWP, and SSG08/Medic Rifle in Horde shop
- added missing magazine upgrades for AWP and SSG08 into the shop
- adjusted positioning of pistol ironsights

- increased round end map vote timer from 60 seconds to 90 seconds
- fixed potential crash issue caused by using certain infusions on launchers
- decreased buildup progression from Ruination infusion, will now gain 8% damage bonus per 5 ticks of Necrosis up to 40% damage increase (previously per 10 ticks)
- changed some gadgets to use their previous cooldown timers and increased their effects to what they were before the overhaul update

- Fixed an issue with being able to equip Marksman Trigger on some launchers
- Decreased chance of Leapers spawning (same rarity as an Exploder now)
- Changed Fists weapon to use "horde_fist" instead of the default Gmod fists, offers improved hit range and faster attack speed
- Improved damage, blast radius, projectile speed, and lock on time for Javelin
- Buffed Carcass' reinforced fists for better damage and splash radius when upgraded, increased hit range of base weapon
- tweaked some variable multipliers across all difficulties so they scale better as difficulty level increases
- reduced max health a turret can leech from Metabolism by 50%
- increased Carcass' maximum health bonus progression (will now have a maximum of 150 health at base with no perks unlocked when you reach rank 25 with the class)
- added health on kill bonus for Carcass base class (gain 5 health per kill) and added 15% movement speed bonus
- AAS Perfume perk on Carcass now also provides a health increase similar to Twin Heart, albeit at a reduced amount
- Added health increase to Bio Thruster and Anabolic Gland perk for Carcass
- doubled duration of Napalm perk's afterburn effect
- increased duration of stacking effects (eg. Adrenaline) to 8 seconds before they expire, previously 5 seconds
- fixed missing pump-action sound for HL2 Shotgun (Horde)
- fixed missing weapon draw and reload sounds for the Heat Blaster

New Gadgets:
- Cash Grab: taken inspiration from one of the new perks, this gadget will allow any class that equips it to have a 25% chance to earn extra money per kill, useful on higher difficulties when money can be sparse
- Loading Drills: based off of Solar Array for Warden, this gadget will allow you to spawn an ammobox every 15 seconds which can be used by yourself or shared with teammates
- one time use gadgets have been introduced from official Horde, allowing players to receive a temporary buff during a wave, they have a pink/purple icon in the shop

Zombie changes:
- New additions: Plague Platoon, Plague Elite, and Leaper
- Plague Platoon is a boss enemy that will only spawn on Wave 10 and summons 3 survivor zombies based on some of the default classes: Demo, Heavy, and Berserker. Plague Demo will shoot RPGs and throw grenades at survivors, Plague Heavy will shoot an M249 at survivors which can inflict the Weakened debuff when hit causing you to do less damage, and the Plague Berserker will run at survivors with a Katana and inflict Bleed. The Berserker is the only one out of the trio to have a damage resistance. Alternatively, one of these three can spawn as a solo enemy as the Wave 5 boss.
- Plague Elite is a elite zombie that can rarely spawn during normal waves and fire energy balls that deal massive damage. They can also summon minions that will also throw grenades and chase the player. As long as the Elite is left standing, they can summon minions every few seconds, so take them out quickly.
- Leaper is a uncommon zombie that starts appearing from Wave 4 onwards. Based off of the Crawler zombie, these enemies (like their name implies) have a leap attack that will inflict a bleeding buildup upon a successful impact with a player similar to the Lesion. They have 50% more health compared to Crawlers and can perform leap attacks twice as often as the Lesion. They do not have a rage function like the Lesion does.
- The Scorcher enemy will now use a flamethrower attack in close proximity.

Additional changes:
- new subclasses: Carcass and Hatcher
- Carcass is a Heavy subclass with high mobility and focused on melee combat. This class can only use its mechanized fists to attack which can deal AOE damage to surrounding enemies if the attack button is held down beforehand, and the fists can be upgraded. It's main gimmick is using Hypertrophy, which decreases damage taken and regenerates health as long as it it active. Hypertrophy is gained by dealing or taking damage. It receives increased maximum health as you progress.
- Hatcher is Medic subclass that uses Antlions to support its teammates. These antlions are summoned by a special Pheropod that is exclusive to this class, which can be upgraded for additional benefits, as well as direct attacks from Antlions to locations and provide them with healing. Antlions provide ranged attacks and generate a pulse that heals teammates. Antlions also are upgraded through an "evolution" gimmick when Pheropods are thrown at them.
- additional Medic specific weapons added from official Horde
- each class now has specific grenades tailored to their role
- Javelin is available for Demolitions
- LAW and RPG rockets should no longer behave weirdly
- UZI and MP40 added to SMGs
- Assault can now purchase the AR2 from Rifles tab
- removed grenade regeneration from classes besides Demolitions
- Heavy's starting weapon changed from SMG-1 to new HL2 based LMG: HMGR9
- new melee weapons available for Berserker
- Engineer has several new types of turrets that can be purchased: a shotgun turret, a laser turret, and a sniper turret
- Warden has several new types of watchtowers that can be purchased: Guardian Watchtower, Beacon Watchtower, and Interceptor Watchtower
- removed class restrictions on light suppressors
- adjusted economy balancing for shop
- ArcCW base has been updated to the latest version for better compatibility with new weapons that have been added to Horde
- due to the weapon base update, underbarrel launchers will now properly play their intended sound effects
- Reduced firing speed penalty of Marksman Trigger to 15%
- updated icon for Super Clip weapon perk
- Updated HUD icon for Galil ARM
- Updated some weapon conversion sounds
- Angled foregrip now provides a slight hipfire bonus
- Muzzle Brake will now also provide a slight reduction to visual recoil (recoil punch), with a weapon volume penalty introduced
- Updated sound of suppressed 7.62 NATO weapons
- Fixed 8.6mm Blackout conversion for the M4 and AR-15 not reducing magazine size to 25
- Added 7.62mm Soviet conversion for Galil ARM

Fixed being able to use FRAG-12 and Dragon's Breath rounds on the M249 with shotgun magazine conversion
Updated M249 shotgun ammo conversion to use correct firing sounds, reduced fire rate and long range damage
Fixed an issue that prevented players from buying the Whisper Barrel for the G3 in Horde
Re-enabled AP/I rounds to be purchased in the Shop, but only for Cremator
Reduced damage penalty on Dragon's Breath shotgun ammo
Added alternative iron sights attachment for the G3 (free attachment)

New attachments added to ArcCW and Horde
- Optic: PSO-1 scope
- New ammunition types: High Velocity, Overpressured, Flechette, Dragon's Breath, FRAG-12, and Explosive
- High Velocity: Improves range significantly vs other ammo types at the cost of overall damage
- Overpressured: Increases weapon's fire rate slightly, but worsens recoil and range
- Flechette: Projectile based ammo type for shotguns that improves range as well as long range damage while improving penetration, but lowers close range damage
- Dragon's Breath: Ammo type for shotguns that ignites targets for 5 seconds on hit, but has less range, has a fixed range where igniting targets is possible, hitting ignited targets increases damage (available for Cremator in Horde)
- FRAG-12: Ammo type available for pump-action shotguns; fires an explosive projectile with a splash radius which can damage yourself at close range, most effective on direct hits, clip size penalty (Available for Demo in Horde)
- Explosive: Ammo type available for assault rifles, lmgs, and sniper rifles; has a splash radius, but deals less direct damage up close, it is possible to hurt yourself in close range, clip size penalty (Available for Heavy and Demo in Horde)
- Galil ARM: 30 and 45 round 7.62mm Soviet ammo conversions
- M4 & AR-15: 25 round 8.6mm Blackout ammo conversion
- SG556: 30 round .300 Blackout ammo conversion
- USP: 13 and 21 round .40 S&W and 15 and 30 round 9mm ammo conversions
- P2000: 12 and 21 round .357 SIG ammo conversions
- New Perks: Super Clip and Slamfire
- Super Clip: Doubles magazine capacity at the cost of reload time and accuracy
- Slamfire: allows pump-action shotguns to be used in a pseudo automatic fire mode at the cost of recoil and accuracy penalties
Fixed weapons not being able to use Armor Piercing/Incendiary Rounds outside of Horde (attachment is still disabled for Horde)
Added backstab feature to the Gunsmith Offensive knives (have same hit detection as backstabbing in TF2)
Decreased damage penalty of Sabot shotgun ammo, changed to projectile ammo type, added increased muzzle velocity attribute
Updated long barrels for shotguns to improve muzzle velocity
Updated short barrels for shotguns to reduce muzzle velocity
Additional shotguns made available for purchase for Cremator
Pump action shotguns made available to purchase for Demo
Fixed HL2 ArcCW weapons in Horde using incorrect world and viewmodels (no more HEV hands)
Fixed additional missing attachments in Shop

Fixed entropy shield giving invincibility.

-Fixed Some Items not being able to move

ArcCW

Adjusted M4A1 underbarrel attachment positioning
Fixed SG556 not being able to accept underbarrel grenade launchers
Improved fire rate of FAL
Decreased fire rate penalty on Marksman Trigger
Low power lasers have had their movement speed penalties decreased
Adjusted recoil "punch" (visual recoil) of several weapons
Adjusted some ammo conversion attachments introduced last update
New weapon: Galil ARM (added by request) - more accurate and higher damage vs ACE, slower fire rate; additional CSGO knives added
New attachments: Tasco Red Dot and Aimpoint MKII reflex sight; marksman barrels for M4A1, AR-15, FAL, and AKM; M320 Underbarrel grenade launcher
The marksman barrels have a damage and range bonus, but at the cost of a decreased fire rate, slower draw time, and lowered handling
Due to previous optics fix, MW2 weps will now be unable to accept GSO red dots/holographics due to being too zoomed in; ACOGs and scopes have been modified to still work with MW2 weapons
Added recoil increase and draw time penalty for weapons using the M203, MASS, GP25, or M320


Horde

Fixed FAL not being able to accept Infusions
Replaced Ghost's MW2 FAL with the GSO FAL, applied identical stats
New weapon and attachments added to shop
Galil ARM is available for Survivor, Assault, and Medic
The new marksman barrels are only available for Ghost
Added RPD to shop for Heavy
Added Gravity Gun to shop for Warden to help circumvent bug where watchtowers can't be picked up until a fix is available (costs $50, consumes no weight slots, under Special category)
Currently investigating bug where Engineer turrets cannot be picked up, fix will be provided when available (attempted to test Gravity Gun to help circumvent issue, but Gravity Gun could not pick up turrets)
Added Titanium infusion to Mjollnir melee weapon
Replaced Chainsaw's Rejuvenating and Quicksilver infusions with Titanium and Siphoning
Improved reload speeds and handling of some MW2 based weapons
Further decreased damage of Double Barrel at range, increased inaccuracy slightly
Decreased inaccuracy of Trench Gun, AA-12, and Striker slightly
Increased price of MASS-26 and underbarrel grenade launchers
Increased price of buying secondary ammo to $100
Decreased price of AUG HBAR and L86 LSW slightly
Fixed Restock not setting Watchtower cooldowns to 10 seconds
Changed ammoboxes to give 5 magazines upon collection
Nerfed T-Virus gadget to boost health to 200% instead of 250%
Healing Projectile Launcher gadget will now heal 75 health to players
Applied particle effects when victim is affected by Frostbite/Bleeding/Poisoned debuffs, from latest version of Horde
Fixed missing sounds for Scorcher enemy