Alien Swarm/Weapon one and Weapon two

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Alien Swarm is rife with various tools, weapons, and miscellaneous items that can help you destroy the Swarm, heal your allies, or a myriad of other special effects.

Upon selecting a campaign to play, players are prompted to select both their character and a choice of two primary weapons, as well as a single secondary weapon. The two primary weapons can be changed at will; the secondary item is used by pressing the 1 key.

Aside from the left mouse button, which uses the default fire mode (for example, the standard assault rifle simply shoots bullets), it is possible to click in with the mouse wheel to execute the weapon's alternate firing mode, assuming it has one (for the above example, the assault rifle would fire a grenade which detonates on impact with a target or the ground). Right-clicking allows players to execute a melee combo attack which is effective against enemies too close for enemy fire. Much like other Steam games, friendly fire cannot be disabled, and on higher difficulties can be the bane of players. Using the melee prevents friendly fire.

When a reload order is issued, either through running out of ammunition in your given clip or manually (R by default), a small gauge appears at the centre of the screen. Hitting R when the cursor is over the white highlighted section of the bar will prompt the character to perform the reload far faster than usual. It is accompanied by a white flash on the weapon's muzzle and possibly a character quote. Failing to hit the reload button at the right time causes the weapon to jam and become unusable for a longer period of time. Avoiding the reload button entirely performs a standard reload. This fast reloading method is necessary to obtain the Quick Reload and Gunslinger achievements.

Players can carry two primary weapons and a single secondary item at any given time. It is possible to exchange these items, or press G to drop a given primary weapon. This is most useful if it is out of ammunition.

Class-specific Weapons

M42 Vindicator

AS M42 Vindicator.png
Unlocked atDefault
ClassOfficer
Damage per Shot105
Rate of Fire1.5 / sec
Reload Speed2.8 sec.
Capacity14 x 6
Alternate FireIncendiary Grenades (x5)
NotesHigh Damage, Close Range

The Vindicator is the first shotgun available in the game, but it is restricted to the Officer class only. That said, however, the Vindicator is the ideal combat shotgun, boasting a far higher rate of fire and magazine size than the standard-issue version. It also sports incendiary grenades which can let it replace the flamethrower in some circumstances. Overall, the Vindicator is a highly effective and deadly weapon, effective at short and medium range.

Official Description: The M42 Vindicator is a pneumatic assisted pump-action shotgun with a dual, selective magazine system. IAF standard ammunition loadout provides for 12-gauge rounds in one magazine and a number of timed incendiary grenades in the other. The Vindicator is only issued to NCO rank marines.

S23A SynTek Autogun

File:AS S23A SynTek Autogun.png
Unlocked atDefault
ClassSpecial Weapons
Damage per Shot7
Rate of Fire10.0 / sec
Reload Speed2.8 sec.
Capacity250 x 2
Alternate FireNone
NotesAuto Aim, Slow Movement

The SynTek Autogun is a hi-tech squad automatic weapon of the Alien Swarm universe. Similar to the M56 Smart Gun found Aliens versus Predator, it's large magazine allows for sustained fire and it features a target tracking device that offers auto aiming for multiple targets. However, its weight slows the user down and it is only available to Special Weapons class. While its modest rate of fire makes it quite capable at handling all but the largest swarm attacks, it is not as efficient at taking out larger swarm creatures. Best used at medium to long range to make full use of its auto aiming capabilities.

IAF Minigun

File:AS IAF Minigun.png
Unlocked at17
ClassSpecial Weapons
Damage per Shot7
Rate of Fire25.0 / sec
Reload Speed2.8 sec.
Capacity250 x 2
Alternate FireBarrel Spin-up
NotesWide Spread, Slow Movement

The Minigun does the same amount of damage as the autogun, but its rate of fire is greatly increased. While it may not have auto targeting like the autogun, it can deliver a hail of fire that can overcome even the most concentrated drone attacks, and quickly take down large swarm creatures. However, the wide spread of fire means you have to get close to large swarm creatures for all shots to hit and its lack of auto aim and high rate of fire means your ammunition being quickly depleted. The gun requires a spin up, making you vunerable to surprise drone attacks and being overkill for taking out one or two drones. This weapon is best used when playing on insane difficulty where drone attacks are large and numerous.

IAF Medical Gun

File:AS IAF Medical Gun.png
Unlocked at9
ClassMedic
Reload SpeedX seconds
Capacity80
Alternate FireHeal Self

A piece of equipment that medics can use instead of the healing beacon. Aim it at a injured marine and it heals them. You can also heal yourself with alt fire. Good to heal while keeping the squad moving, but can only heal one marine at a time. The medical gun cannot be reload and is discarded once it is expended.

22A7-Z Prototype Assault Rifle (Technician)

File:AS 22A7-Z Prototype Assault Rifle.png
Unlocked atDefault
ClassTechnician
Damage per Shot5
Rate of Fire14.3 / sec
Reload Speed2.8 sec.
Capacity98 x 6
Alternate FireStun Grenades (x5)
NotesAuto Aim

A rifle restricted to tech marines. Primary fire functions identical to standard issue assault rifles, but with added auto aim. Instead of frag grenades for its secondary fire, it fires stun grenades. Useful for getting yourself or a teammate out of a pinch without the punishing friendly fire.

Weapons

22A3-1 Assault Rifle

File:AS 22A3-1 Assault Rifle.png
Unlocked atDefault
Damage per Shot5
Rate of Fire14.3 / sec
Reload Speed2.8 sec.
Capacity98 x 6
Alternate FireFrag Grenades (x5)
NotesNone

Standard issue assault rifle available right off the bat. Rounds don't do much damage, but is offset with its decent rate of fire. Secondary fire mode fires the attached grenade launcher and is one of the few explosive ordnance available for low levelled players. Best used against drones while still lending a hand at taking down larger targets. A versatile weapon useful throughout the whole campaign.

M73 Twin Pistols

File:AS M73 Twin Pistols.png
Unlocked atDefault
Damage per Shot14
Rate of Fire2.0 / sec
Reload Speed1.4 sec.
Capacity24 x 11
Alternate FireNone
NotesAmmo Efficient

Two handguns used together. Each handgun bullet does more damage than a standard assault rifle round but with only 24 rounds, meaning more time being vunerable while reloading. The twin pistols is the only weapon that can be fired without movement speed penalty. All other weapons available will cause the user to lose speed when they fire. A good aim and being able to fast reload consistently is required to make the most of twin pistols.

Model 35 Pump-action Shotgun

File:AS Model 35 Pump-action Shotgun.png
Unlocked at3
Damage per Shot175
Rate of Fire1.0 / sec
Reload Speed1.8 sec.
Capacity4 x 9
Alternate FireNone
NotesHigh Damage, Close Range

A very powerful shotgun available for all classes to use. Does more damage than the vindicator, it can take out large swarm creatures with a few solid hits. Unfortunately, it is hampered with its small magazine size and the maximum amount of total ammunition carried. Nevertheless, it is still one of the most powerful weapons available for low levelled marines.

IAF Tesla Cannon

File:AS IAF Tesla Cannon.png
Unlocked at5
Damage per Shot1
Rate of Fire4.0 / sec
Reload Speed3.1 sec.
Capacity10 x 26
Alternate FireNone
NotesStuns, No Friendly Fire

Precision Rail Rifle

File:AS Precision Rail Rifle.png
Unlocked at7
Damage per Shot75
Rate of FireN/A
Reload Speed1.8 sec.
Capacity1 x 73
Alternate FireNone
NotesPiercing Rounds

K80 Personal Defense Weapon

File:AS K80 Personal Defense Weapon.png
Unlocked at11
Damage per Shot7
Rate of Fire18.6 / sec
Reload Speed1.4 sec.
Capacity80 x 12
NotesUses Ammo Quickly

M868 Flamer Unit

File:AS M868 Flamer Unit.png
Unlocked at13
Damage per Shot2
Rate of Fire10.0 / sec
Reload Speed3.1 sec.
Capacity40 x 6
Alternate FireFire Extinguisher
NotesIgnites, Use with Caution

AVK-36 Marksman Rifle

File:AS AVK-36 Marksman Rifle.png
Unlocked at19
Damage per Shot65
Rate of Fire0.8 / sec
Reload Speed2.8 sec.
Capacity12 x 6
Alternate FireEnhanced Target Imaging
NotesPiercing Bullets

Chainsaw

File:AS Chainsaw.png
Unlocked at23
Damage per Shot31
Rate of Fire2.0 / sec
Reload Speed3.1 sec.
CapacityInfinite
Alternate FireNone
NotesUnlimited Ammo

Grenade Launcher

File:AS Grenade Launcher.png
Unlocked at27
Damage per Shot80
Rate of Fire0.6 / sec
Reload Speed4.5 sec.
Capacity6 x 4
Alternate FireNone
NotesSplash Damage

Secondary Items

IAF Personal Healing Kit

File:AS IAF Personal Healing Kit.png
Unlocked atDefault
NotesSingle Use

Hand Welder

File:AS Hand Welder.png
Unlocked atDefault
NotesSeals and Unseals Doors

SM75 Combat Flares

File:AS SM75 Combat Flares.png
Unlocked atDefault
NotesProvides Auto-Aim Bonus

ML30 Trip Mine

File:AS ML30 Trip Mine.png
Unlocked atDefault
NotesWall Mountable

I3A Tactical Heavy Armor

File:AS I3A Tactical Heavy Armor.png
Unlocked at2
Notes20% Less Damage, Passive

X33 Damage Amplifier

File:AS X33 Damage Amplifier.png
Unlocked at4
Notesx2 Damage Aura

Hornet Barrage

File:AS Hornet Barrage.png
Unlocked at6
NotesHoming Missle Attacks

Freeze Grenades

File:AS Freeze Grenades.png
Unlocked at8
NotesLarge Radius

Adrenaline

File:AS Adrenaline.png
Unlocked at10
NotesTemporary Slow Motion

IAF Tesla Sentry Coil

File:AS IAF Tesla Sentry Coil.png
Unlocked at12
NotesStuns in Radius

v45 Electric Charged Armor

File:AS v45 Electric Charged Armor.png
Unlocked at14
NotesStops Infestation, Stuns

M478 Proximity Incendiary Mines

File:AS M478 Proximity Incendiary Mines.png
Unlocked at16
NotesFire Wall

Flashlight Attachment

File:AS Flashlight Attachment.png
Unlocked at18
NotesPassive

IAF Power Fist Attachment

File:AS IAF Power Fist Attachment.png
Unlocked at20
Notesx2 Melee Damage, Passive

Hand Grenades

File:AS Hand Grenades.png
Unlocked at22
NotesSplash Damage

MNV34 Nightvision Goggles

File:AS MNV34 Nightvision Goggles.png
Unlocked at24
NotesRechargeable

MTD6 Smart Bomb

File:AS MTD6 Smart Bomb.png
Unlocked at26
NotesMissle Storm, Single Use

Assault Jets

File:AS Assault Jets.png

Blink Pack

File:AS Blink Pack.png

Tools, Deployables, Miscellaneous

IAF Advanced Sentry Gun

File:AS IAF Advanced Sentry Gun.png
Unlocked atDefault
Damage per Shot10
Rate of Fire12.5 / sec
Reload SpeedN/A
Capacity450
Alternate FireN/A

IAF Heal Beacon

File:AS IAF Heal Beacon.png
Unlocked atDefault
NotesGroup Healing

IAF Ammo Satchel

File:AS IAF Ammo Satchel.png
Unlocked atDefault

IAF Medical Gun

File:AS IAF Medical Gun.png
Unlocked at9
NotesMobile Healing

IAF Freeze Sentry Gun

File:AS IAF Freeze Sentry Gun.png
Unlocked at15
Damage per ShotN/A
Rate of FireN/A
Reload SpeedN/A
Capacity800
Alternate FireN/A
NotesFreezes, Fast Targeting

IAF Incendiary Sentry Gun

File:AS IAF Incendiary Sentry Gun.png
Unlocked at21
Damage per Shot35
Rate of Fire10.0 / sec
Reload SpeedN/A
Capacity800
Alternate FireN/A
NotesIgnites, Fast Targeting

IAF High Velocity Sentry Cannon

File:AS IAF High Velocity Sentry Cannon.png
Unlocked at25
Damage per Shot80
Rate of Fire0.6 / sec
Reload SpeedN/A
Capacity25
Alternate FireN/A
NotesLong-Range, Splash Damage

Fire Extinguisher

File:AS Fire Extinguisher.png

Mining Laser

File:AS Mining Laser.png