Infiltrator Skills in Phoenix Point are active and passive abilities that the Infitrator Unit can acquire by leveling up. There are 7 basic Infiltrator Skills and ??? Random Skills. Skills are restricted by unit level and Skills Points are required to unlock them. At level 4 Heavy Units will be able to select a second class unlocking that class weapon proficiency and all Basic Skills.
Infiltrator Skills in Phoenix Point
Infiltrator Basic Skills
There are 7 Infiltrator Basic Skills, and they are restricted by level. When an Infiltrator unit levels up it will be able to unlock a new Basic Skill by spending Skill Points. Below you can find a list of all Infiltrator Basic Skills in Phoenix Point.

Infiltrator Training
Proficiency with Crossbows and Spider Drone deployment. Base line stealth factor is 25% as long as the character isn't revealed.

Surprise Attack
Attacks from behind gain shock value equal to 3 times the damage dealt.

Deploy Decoy
Deploy holographic decoy at the chosen location. The decoy is treated as a real target by all enemies. (Costs 3 Willpower)
Lvl 4

New Class
Choose a secondary class to train in.

Spider Drone Pack
Deploy 3 Spider Drones with one action

Vanish
Move within 5 tiles and disappear from view for the next turn (or until spotted) (Costs 4 Willpower)

Sneak Attack
Damage dealt while not spotted is increased by 50%
Random Skills
Random Skills in Phoenix Point are abilities that are shared among all units. Each unit have 3 Random Skills assigned from the pool. These skills are randomly assigned to any level from 1 to 7 and units will still need to spend Skill Points to unlock them. Below you will find all Random Skills in Phoenix Point.

PDW Proficiency
Proficiency with PDWs at +10% Accuracy

Shotgun Proficiency
Proficiency with Shotgun at +10%Accuracy

Heavy Weapon Proficiency
Proficiency with Heavy Weapons at +10% Accuracy

Steal Specialist
Additional +25 to steal of armor

Expert Heavy Weapons
Additional +20% Damage when using Heavy weapons

Grenade Proficiency
Proficiency with Grenades at +10% range

Handgun Proficiency
Proficiency with Handguns at +10% Accuracy

Sniper Rifle Proficiency
Proficiency with Sniper Riffles at +10% Accuracy

Expert Runner
Additional +2 Speed

Assault Rifle Proficiency
Proficiency with assault Rifles at +10% Accuracy

Expert Mounted Weapons
Additional +20% range when using Mounted weapons.

Expert Shooter
Shoot with +20 Accuracy

Devoted
Additional +2 to Willpower

Quarterback
50% bonus Grenade range and +2 Speed

Biochemist
All attacks that damage a target also inflict 1 viral damage (per bullet)

Cautious
20% bonus accuracy and -10 damage dealt

Farsighted
Additional +2 to Willpower and 10 Perception range

Reckless
30% bonus damage dealt and -20% accuracy

Expert Packer
Carry +25% maximum weight

Expert Thrower
Throw at +50% distance