1. Hunter

Unlock usage of the Howler, replacing your throwable. Upon pressing [grenade], enter an animalistic frenzy, stowing your primary and secondary weapons and preventing you from performing interactions. In return, gain access to a devastating melee Pounce strike that deals significant damage upon contact with an enemy, as well as a Howl ability that stuns nearby enemies with a deafening screech. Pounce has a cooldown of 3 seconds, and is activated with your "steelsights" keybind. Howl has a cooldown of 7 seconds, and is activated with your "primary attack" keybind.
Additionally, you gain +100% melee damage and +75% faster movement speed while using Howler.
This item has a 120 second cooldown, and is reduced by 1 seconds for a ranged kill, 2 for a melee kill, and 3 for a pounce kill.
Tasers who attempt to tase you in this state are instead stunned.
Note: Howler state can be manually ended by holding [grenade] for 1 second. When you manually cancel Howler, you are refunded 75% of the remaining duration towards your cooldown.

3. Skin Thick As Steel

Convert all armor to health.
Taking damage does not deal it all at once, instead dealing it over time. When an enemy damages you, they are marked, with the amount of damage increasing the tier of mark. Upon a successful kill on an enemy that has dealt damage to you, negate the remaining damage over time dealt to you by that enemy, and additionally heal you for 10% of the negated damage.

5. Opportunistic

Upon killing an enemy, restore a percentage of your maximum health, depending on the type of attack: Headshot kills restore 5%, and Melee kills restore 10% (Pounce melee kills restore an additional 10%).
You deal triple the amount of melee damage to marked enemies.\nKilling a marked enemy resets the Pounce cooldown. Killing a Special Unit with a Pounce grants 3 stacking seconds of invulnerability.

7. Throwing Your Weight Around

Landing a Pounce stuns nearby units, knocking down the target.
Your speed is now unaffected by armor.

9. I Am Leviathan

Upon taking lethal damage during Howler, you drop from your rage, and are instead healed by 50% of your maximum health.
For every enemy currently attacking you, you have 1 stack of Pack Hunted. Each stack of Pack Hunted grants you 5% damage resistance, up to a cap of 50%, and killing a marked target restores 5% health per stack.
Killing an enemy while in rage increases the rage duration by 3 seconds.

Note: The individual for whom this perk deck was tailored quit PAYDAY 2 a while ago, so it didn't get as many playtest/revision cycles as I'd have liked, but it's still such a fun perk deck in its current unfinished state that I think others should have the chance to try it. (It's also one of the most complex and featured perk decks I've ever made.)

1. Skedaddle

Increased interaction speed by 25%, movement speed by 25%, dodge by 15%.
Striking an enemy with your melee attack inflicts Flick, stunning them for a brief duration.
You can now sprint with loot bags of any weight.
Your rate of stamina regeneration is increased by 25%.

3. Wardance

Enemies hit by Flick are marked, taking 50% increased damage for 10 seconds.

Inflicting Flick on enemies grants a 30% movement speed boost for 5 seconds.
Your chance to dodge is further increased by 5%, and your interaction speed is increased by a further 25%.

5. Carpet Shark

Sacrifice all but 1 armor point for 5% increased dodge chance, 5% movement speed, and +20 HP.
When your armor breaks, you become immune to damage for 2 seconds. This effect can only happen once per armor break, and is refreshed when your armor is fully restored.
Targets marked by Flick can be killed to provide a healing burst equivalent to 10% of your maximum health.
While out of danger, you regenerate health- after not taking damage for 15 seconds, you regenerate 0.5% of your maximum health every 1 second.
Interaction speed is further increased by 25%.

7. Chew The Wires

Interactions will produce a burst of electricity, briefly shocking all nearby units within a radius of 7 meters, as well as giving allies a jolt that briefly boosts their movement speed.
Your chance to dodge is further increased by 10%, and your interaction speed is further increased by 25%.

9. Can't Sit Still

Upon reviving an ally, Flick is applied to all enemies within 10 meters, allowing you and your ally to get out of danger, and you gain a temporary 25% damage reduction for 5 seconds.

1. This Is My Rifle

You gain a stack of Spool Up for every second of continuous firing, up to a maximum of 5 stacks. All stacks are lost when firing stops for longer than 1 second.
Wearing the 2 Piece Suit reduces max stacks by one, while wearing the Ballistic Vest increases them by one. The Lightweight Ballistic Vest does not add nor subtract maximum stacks.
Each stack of Spool Up increases your weapon accuracy and stability by 5%.
You gain an additional +5% Armor.
You have a stack of Plant Your Feet for each stack of Spool Up, impeding your movement speed by 5% per stack.

3. Don't Let Up

Wearing the Heavy Ballistic Vest increases maximum Spool Up stacks by 2.
Every stack of Spool Up increases reload and movement speed by 5%.
You gain an additional +5% Armor.

5. I Can Take It

Wearing the Flak Jacket increases maximum Spool Up stacks by 3.
Every stack of Spool Up grants 5 stacks of damage absorption, refreshing every 10 seconds. When you have a bipod deployed, the amount of damage absorption granted by Spool Up is doubled.
You gain an additional +5% Armor.

7. Lay Down the Fire

Wearing the Combined Tactical Vest increases maximum Spool Up stacks by 4.
Every stack of Spool Up adds 0.5 seconds of limitless ammo on reload. Magazine must be below 20% for this to work.
Reloading now clears all stacks of Spool Up and Plant Your Feet, replenishing 20 armor per stack of Spool Up.
Every stack of Spool Up increases chance of firing without using ammunition by 5%.
You gain an additional +5% Armor.

9. I'm Not Done Yet

Wearing the Improved Combined Tactical Vest increases maximum Spool Up stacks by 5.

At maximum stacks, you may fire past ammo depletion, drawing from ammo reserves.
When fire has halted, instead of losing all stacks of Spool Up, one stack of Spool Up decays per second. The initial amount of time before stacks begin to decays also increases by 0.5 seconds per kill made, capped at 10 seconds.

1. Biological Warfare

Unlocks the Catalyzer, replacing your throwable. Upon activating, all instances of damage dealt by poison gas ramp up over time, adding an additional 2 damage per second for 10 seconds. 90 second cooldown. Every kill decreases the cooldown by 1 second.

3. Anticognizant

+20 HP. Enemies suffering from gas damage are highlighted, and upon using Catalyzer, the poison release potent toxins into the brain, briefly causing confusion and intense migraines in those affected. Increase ramp up damage to an additional 3 per second.

5. Breathe Deep

+20 HP. Catalyzer's initial duration increases by 1 second for every enemy taking poison gas damage upon activation. While inside a gas cloud, you gain 2% damage resistance for every enemy killed via melee, capping at 50% for 10 seconds. This timer pauses while standing in a cloud, and refreshes on melee kill. Increase ramp up damage to an additional 4 per second.

7. Toxic Relationship

While the Catalyzer is active, for every 5 enemies killed by allies or poison gas damage, you and all allies restore 5% health. If the unit dies from an ally's melee attack, this amount increases to 10%. Increase ramp up damage to an additional 5 per second.

9. Coursing Through Your Veins

+30 HP. Upon activating Catalyzer, all allies gain a 30% speed boost, with your own being refreshed by 1 second on melee kill and doubles all healing from gas sources.
Kills now decrease the Catalyzer cooldown by 2 seconds.
You deal 50% more damage to enemies who are afflicted by poison gas.
Overexposure to these toxins has bolstered your body; you gain 4% damage reduction instead of 2%, and reload grenade launchers 50% quicker.