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Turrets:

Gun [$1000]
-10 Power
-100 Armor
~A standard turret built for standard defenses.

<requires Gun>Double Gun [$2000]
-10 Power
-200 Armor
-Special: 2-way
~Another barrel added.

<requires Gun>Heavy Gun [$2500]
-20 Power
-300 Armor
-Stuns
~An upgraded gun turret with more armor and damage. It's also a bit more beefy.

<requires Gun>Machine Gun [$1500]
-5 Power
-150 Armor
-Rapid
~Weaker, but shoots faster.

<requires Heavy Gun>Mega Gun [$4000]
-40 Power
-600 Armor
-Special: Stun
~Modified to pack more of a punch.

<requires Double Gun>Triple Gun [$3000]
-20 Power
-300 Armor
-Special: 3-way
~Unknowingly increases your hit rate by 50%.

<requires Machine Gun>Chain Gun [$3000]
-10 Power
-300 Armor
-Special: Super Rapid
~Generally shoots faster
and deals more damage.

<requires Gun>Sniper Turret [$2500]
-50 Power
-250 Armor
-Special: Instant, Armor Piercing
~Delivers a powerful stab at enemy forces, but requires a noticeable cooldown.

<requires Sniper Turret>Gauss Turret [$5000]
-70 Power
-500 Armor
-Special: Instant, Armor Piercing, Malfunction
~Magnetically charged rounds provide an extra boost as well as a chance to stun enemies.
Masteries
Masteries can be re-decided at the end of each wave.
Attack:Bullet Mastery
Lvl. 1: Increases the damage of Bullets by 10%.
Lvl. 2: Increases the damage of Bullets by 20%.
Lvl. 3: Increases the damage of Bullets by 30%.
Energy Mastery
Lvl. 1: Increases the damage of Energy based weapons by 10%.
Lvl. 2: Increases the damage of Energy based weapons by 20%.
Lvl. 3: Increases the damage of Energy based weapons by 30%.
Explosives Mastery
Lvl. 1: Increases the damage of Explosives by 10%.
Lvl. 2: Increases the damage of Explosives by 20%.
Lvl. 3: Increases the damage of Explosives by 30%.
Armor Piercing <Requires Lvl. 3 Bullet Mastery>
Lvl. 1: Bullets have a 25% chance to ignore enemy defenses.
Lvl. 2: Bullets have a 50% chance to ignore enemy defenses.
Lvl. 3: Bullets have a 75% chance to ignore enemy defenses.
Lvl. 4: Bullets have a 100% chance to ignore enemy defenses.
Exploding Rounds <Requires Lvl. 3 Explosives Mastery>
Lvl. 1: Bullets have a 25% chance of exploding.
Lvl. 2: Bullets have a 50% chance of exploding.
Lvl. 3: Bullets have a 75% chance of exploding.
Lvl. 4: Bullets have a 100% chance of exploding.
Critical Mastery <Requires Armor Piercing Lvl. 4>
Lvl. 1: Weapons gain 5% Crit Chance.
Lvl. 2: Weapons gain 10% Crit Chance.
Lvl. 3: Weapons gain 15% Crit Chance.
Malfunctioning Shots <Requires Energy Mastery Lvl. 3>
Lvl. 1: Weapons gain 5% Stun Chance.
Lvl. 2: Weapons gain 10% Stun Chance.
Lvl. 3: Weapons gain 15% Stun Chance.
Chemical Mastery
Lvl. 1: Increases the damage of Chemical based weapons by 10%.
Lvl. 2: Increases the damage of Chemical based weapons by 20%.
Lvl. 3: Increases the damage of Chemical based weapons by 30%.
Reload Mastery
Lvl. 1: Increases the attack speed of weapons by 33.3%.
Lvl. 2: Increases the attack speed of weapons by 66.6%.
Lvl. 3: Increases the attack speed of weapons by 100%.
Cluster Explosions
Lvl. 1 Explosions will have a 50% chance of clustering.
Offensive Mastery
Lvl. 1 Increases all damage given by 10%.
DefenseArmor Mastery
Lvl. 1: Increases the Armor of Turrets by 50%.
Lvl. 2: Increases the Armor of Turrets by 75%.
Lvl. 3: Increases the Armor of Turrets by 100%.
Health Mastery
Lvl. 1: Increases the Health of Infantry by 50%.
Lvl. 2: Increases the Health of Infantry by 75%.
Lvl. 3: Increases the Health of Infantry by 100%.
Sturdiness <Requires Lvl. 3 Armor Mastery>
Lvl. 1: Increases the Crit Defense of Turrets by 10%.
Lvl. 2: Increases the Crit Defense of Turrets by 25%.
Lvl. 3: Increases the Crit Defense of Turrets by 50%.
Repair Mastery <Requires Lvl. 3 Health Mastery>
Lvl. 1: Increases the Rate of Repair to Turrets by 50%.
Lvl. 2: Increases the Rate of Repair to Turrets by 75%.
Lvl. 3: Increases the Rate of Repair to Turrets by 100%.
Last Stand <Requires Lvl. 3 Sturdiness>
Lvl. 1: Turrets have a 50% chance of not being totaled.
Reflecting Shields <Requires Lvl. 3 Armor Mastery>
Lvl. 1: Turrets gain a shield that reflects 10% damage.
Lvl. 2: Turrets gain a shield that reflects 15% damage.
Lvl. 3: Turrets gain a shield that reflects 20% damage.
Disrupter
Lvl. 1: Turrets that get hit have a 5% chance to stun the attacker.
Lvl. 2: Turrets that get hit have a 10% chance to stun the attacker.
Lvl. 3: Turrets that get hit have a 15% chance to stun the attacker.
Scrap Mastery
Lvl. 1: Turrets that were totaled will be redeemed for 50% of the buying cost, also increases the damage of turrets by a percentage of their missing health.
Shield Mastery <Requires Lvl. 3 Reflecting Shields>
Lvl. 1: Shields gain 100% effectiveness.
Lvl. 2: Shields gain 100% effectiveness and absorb 10% of the damage taken.
Security Mastery
Lvl. 1: Decreases the chance of theft by 50%.
Defensive Mastery
Lvl. 1: Decreases damage taken by 10%.
UtilityMoney Mastery
Lvl. 1: Money gained from enemies is increased by 50%, and the cost for Turrets is reduced by 10%.
Lvl. 2: Money gained from enemies is increased by 100%, and the cost for Turrets is reduced by 20%.
Gossiper
Lvl. 1: Gossip is more useful.
Range Mastery
Lvl. 1: Increases attack range and sight range of Turrets by 1
Lvl. 2: Increases attack range and sight range of Turrets by 2
Lvl. 3: Increases attack range and sight range of Turrets by 3
Enemy Mastery <Requires Lvl. 1 Gossiper>
Lvl. 1: Enemies will display their Attack.
Lvl. 2: Enemies will display their Attack and Money Drop.
Lvl. 3: Enemies will display their Attack, Money Drop and Special traits.
Accurate Aim <Requires Lvl. 3 Range Mastery>
Lvl. 1: Decreases Miss Chance by 50%.
Salvager
Lvl. 1: Increase your salvages by 50%.
Lvl. 2: Increase your salvages by 75%.
Lvl. 3: Increase your salvages by 100%.
Terrain Mastery
Lvl. 1: Decreases your enemy spawns by 10%.
Lvl. 2: Decreases your enemy spawns by 15%.
Lvl. 3: Decreases your enemy spawns by 20%.
Supply Crates
Lvl. 1: Supply Crates will drop every 3-5 turns.
Buff Mastery
Lvl. 1: Increases the effect of buffs by 25%.
Lvl. 2: Increases the effect of buffs by 50%..
Weather Mastery <Requires Lvl. 3 Terrain Mastery>
Lvl. 1: Decreases the negative effects of weather by 50%.
Gear Mastery
Lvl. 1: Increases your Morale by 5%
Merchant
Trade
Gossip
Craft