Perk

Every character in the game, whether player-made or AI, have a trait known as a Perk, which is a beneficial trait that gives the character bonus stats or abilities. Perks are randomly chosen, so a player cannot choose the perk. A character can only have one Perk, and each Class has two possible perks that can be chosen.

Engineer

 * Heavy Deployment - Killstreak turrets have +50% health and duration.
 * Guidance System - Killstreak turrets shoot 25% faster.

Gunslinger

 * Gun Play - Killing an enemy instantly reloads your other weapon.
 * Critical Boost - Nearby allies gain +10% critical chance.

Medic

 * Loving Spirit - Nearby allies respawn 3x quicker.
 * Healing Aura - Slightly heal all nearby allies every 3 seconds.

Juggernaut

 * Vital Bomb - Explode on death, damaging enemies.
 * Deflective Armor - 8% chance to deflect enemy bullets. (you still take damage)

Ninja

 * Chameleon - Stealthed while not firing or near enemies.
 * Matrix Dodge - 7% chance to dodge any projectile attack.

Mercenary

 * Vital Bomb - Explode on death, damaging enemies.
 * Explosive Temper - Gain 25% rate of fire while under 40% hp.

Sniper

 * Brain Magnet - 10% chance for any shot to count as a headshot.

Elite

 * Energy Ammo - Can't pick up ammo, but ammo slowly replenishes.

Goofs

 * The Engineer you start with has Energized as a trait, instead of Heavy Deployment or Guidance System.
 * The same goes for the Gunslinger you obtain after Mission 1, which has Inspire as a trait.