Perks

Perks are special abilities that are given to Players in Surviv.io. These perks vary depending on the rank that the Player has.

Leadership
Leadership is the perk that Faction Leaders are given. This was added during the v0.7.2 "" update. It gives the player max adrenaline permanently and increases their size by 25%.

Firepower
Firepower is the perk that Lieutenants are given during 50v50. It is also given to the Lieutenant Helmet-wearer in the Desert Rain. This was added during the v0.7.2 "" update. It increases their gun's magazine by about 50%, with some exceptions.

Some have no change, such as:
 * MP220
 * Mosin-Nagant
 * Flare Gun
 * OT-38
 * OTs-38
 * Peacemaker
 * M1 Garand
 * Model 94

Some have larger changes, such as:
 * USAS-12 (200%)
 * M9 (200%)
 * MAC-10 (156.25%)
 * M1A1 (5/3)

Some have smaller changes, such as:
 * PKP Pecheneg (125%)
 * Super 90 (125%)
 * AN-94 (4/3)

Mass Medicate
The Mass Medicate is a perk given to the Medics. With the perk, the Medic can heal players surrounding the Medic. The possible healing are: The circle appears when the Medic is healing himself, or reviving a teammate. To activate it, hold C and right click the mouse.
 * Restore health (Red circle)
 * Increase adrenaline (Green circle)
 * Reviving downed players (Purple circle)

Windwalk
Windwalk is one of two perks given to the Woods King. It gives the player increased speed (+4.8 speed) for 4 seconds when hit by bullets, even teammates, as long as the bullets weren't fired by the player with the perk.

Gift of the Woods
Gift of the Woods is the second perk given to the Woods King. It grants the player with health regeneration (The exact same as 25% Adrenaline, or 1 health every 3 seconds) and 25% increased body size, like the Faction Leaders.

Rare Potato
Rare Potato is a perk given by the K-pot-ato Helmet. With this perk, if a player destroys a potato, it increases the chance to give a good weapon by making the weapon swap requiring the weapon to have the quality value of 1.

Using

 * Leadership
 * Use the max Adrenaline to your advantage to move faster and heal yourself when you are not fighting with the opposing team.
 * Firepower
 * If your Backpack cannot hold too much ammo, simply fully reload the gun of that ammo and you will save a lot of time to ready to fight as well as holding more ammo.
 * Mass Medicate
 * Keep close to the teammates. When they need to heal, just click one of the consumables (full for you), and call the teammates to heal buth them and yourself.
 * Windwalk
 * Windwalk is perfect for "hunting down" and running away from enemies, as you can move at fast speeds even on water.
 * If you're playing with teammates, have them shoot at you, as you'll get the windwalk ability without taking any damage. Nick (one of the developers) has confirmed that this is an intended feature
 * Gift of the Woods
 * The effects of this perk aren't significant, they just are. Consider it a slight stat buff.
 * Rare Potato
 * If you find random weapons around, shoot them at potatoes. When you have 2 guns that you are satisfied with, use this perk to give your teammates good or better weapons.

Against

 * Leadership
 * Keep crossfire. It will make a leader low on health.
 * Faction Leaders also have the Leader Helmet providing massive armoring, as well as an AN-94 or Super 90. To help against the armor, Try high damage or DPS weapons, like the SV-98 or MAC-10. SMGs such as the MAC-10 and Vector are typically stronger than their weapons when close enough so try to use that to your advantage, however be aware that they may have a close range weapon too.
 * Firepower
 * Since they have more capacity than other weapons, if your weapons run out of ammo, try to use something like a Tree or Stone to shield yourself from them
 * Mass Medicate
 * They just heal up faster, which is the main problem. Kill the Medic first can solve it.
 * Windwalk
 * Since windwalk leaves behind a trail of glowing leaves, follow them when the king tries to run away.
 * Don't shoot at the king until you have a sure enough shots will connect to deal a sizeable portion of damage
 * Use Melee weapons as those don't trigger Windwalk.
 * Gift of the Woods
 * The small health regeneration it gives isn't important, and the increased size makes them slightly easier to hit.
 * Rare Potato
 * The only effect of this is that they end up with rare weapon combos, which happens anyways, so just fight as you usually would against them

Trivia

 * In the code, perks are just images, names, and descriptions, while the stats are actually decided by the role you have.