Upgrades.png

Upgrades in Kingdom Rush are used to increase the power and effectiveness of towers and spells. There are six upgrade trees, one for each tower type and one for each spell. Each tree has a total of five upgrades.

Stars[edit | edit source]

Upgrades are bought with stars, which can be obtained in several ways:

  • Completing a Campaign level gives stars based on the number of lives left:
    • 18-20 lives: 3 stars
    • 6-17 lives: 2 stars
    • 1-5 lives: 1 star
  • Completing a Heroic Challenge or Iron Challenge gives 1 star.
  • Exclusive to the Flash version:
    • Buying the Premium Content gives 15 stars.
    • Clicking on the Twitter and Facebook buttons gives 1 star each.
    • Trivia
    • You need to get 65 (62 stars on Flash) stars to buy every upgrade on all six trees in the original Kingdom Rush.

Kingdom Rush[edit | edit source]

Archer Tower[edit | edit source]

  • KR Up Salvage.png Salvage (1 Star)
    • Marksmen Towers return 90% of value when sold. (Normally a rate of return is 60%.)
  • KR Up EagleEye.png Eagle Eye (1 Star)
    • Increases Marksmen attack range (by 10%).
  • KR Up PierSht.png Piercing Shots (2 Stars)
    • Piercing shots ignore a 10% of the enemy's physical armor.
  • KR Up FarShot.png Far Shots (2 Stars)
    • Increases marksmen attack range (by 10%).
  • KR Up Presc.png Precision (3 Stars)
    • Marksmen attacks have a chance of dealing double damage. (10%)

Barracks[edit | edit source]

  • KR Up Tough.png Toughness Training (1 Star)
    • Barracks train soldiers with more health. (+10% health)
  • KR Up BetArmor.png Better Armor (1 Star)
    • Barracks train soldiers with improved armor. (+10% armor)
  • KR Up ImpDep.png Improved Deployment (2 Stars)
    • Improves rally point range (by 20%) and reduces soldier training time.
      • (Respawn time is reduced by 3 seconds for Holy Order, and by 2 seconds for the others.)
  • KR Up EndTrain.png Endurance Training (2 Stars)
    • Barracks train soldiers with even more health. (+20% health of the main one)
  • KR Up Spiked.png Spiked Armor (3 Stars)
    • When attacked, soldier's spiked armor return a 10% of the damage to the attacker. Spiked Armor also affects Reinforcements and Heroes. (dealt as True Damage)

Magic Tower[edit | edit source]

  • KR Up SpellReach.png Spell Reach (1 Star)
    • Increases wizard's attack range (by 10%).
  • KR Up ArcShatt.png Arcane Shatter (1 Star)
    • Magic attacks destroy a potion of enemy physical armor on every hit.
  • KR Up Heremtic.png Hermetic Study (2 Stars)
    • Mage Towers construction and upgrading costs are reduced by 10%.
  • KR Up EmpMagic.png Empowered Magic (2 Stars)
    • Increases wizard's attack damage. (about 15%)
  • KR Up SlowCurse.png Slow Curse (3 Stars)
    • Magic attacks slow enemies by half their speed for a moment
      • (half a second, Arcane Wizard the whole one-second beam duration. Also disables Rocket Rider Turbo boost).

Artillery[edit | edit source]

  • KR Up ConcFire.png Concentrated Fire (1 Star)
    • Increases artillery attack damage (10% damage increase).
  • KR Up Range.png Range Finder (1 Star)
    • Increases artillery attack range (by 10%).
  • KR Up FieldLog.png Field Logistic (2 Stars)
    • Artillery construction and upgrading costs are reduced by 10%.
  • KR Up Indust.png Industrialization (3 Stars)
    • Artillery special abilities costs are reduced by 25%.
  • KR Up SmartTar.png Smart Targeting (3 Stars)
    • Artillery suffers no reduction of splash and chain lightning damage.
      • (Means the damage is not reduced by distance from the center of explosion or between targets of Tesla x104 electric bolt. This upgrade applies to Cluster Bomb also.)

Rain of Fire[edit | edit source]

  • KR Up BlazSky.png Blazing Skies (1 Star)
    • Adds 2 additional meteors and increases meteor damage. In mobile, it has 5 meteors initially, but this upgrade increase damage of the meteors.
  • KR Up Scorch.png Scorched Earth (2 Stars)
    • Meteors set the ground on fire burning enemies over it for 5 seconds.
  • KR Up FastFur.png The Fast & Furious (3 Stars)
    • Increases meteor damage, explosion radius by 25% and reduces cooldown by 10 seconds.
  • KR Up BlazEarth.png Blazing Earth (3 Stars)
    • Doubles damage and duration of scorched earth, and reduces cooldown by 10 seconds.
  • KR Up Catac.png Cataclysm (3 Stars)
    • Increases meteor damage and rains 5 additional meteors at random locations all over the battlefield.

Reinforcements[edit | edit source]

  • KR Up WellFed.png Well Fed (2 Stars)
    • Well Fed Farmers have additional health and deal a little more damage.
      • (50 HP, 1-3 damage)
  • KR Up Consc.png Conscripts (3 Stars)
    • Conscripts have more health and are better equipped.
      • (70 HP, 10% armor, 2-4 damage)
  • KR Up Warr.png Warriors (3 Stars)
    • Warriors have even more health and are excellently equipped.
      • (90 HP, 20% armor, 3-6 damage)
  • KR Up Legion.png Legionnaires (3 Stars)
    • Legionnaires have the most health and wear the best equipment.
      • (110 HP, 30% armor, 6-10 damage)
  • KR Up SprThrw.png Spear Throw (4 Stars)
    • Gives Legionnaires a spear throw attack that can target ground and flying enemies.
      • (110 HP, 30% armor, 6-10 damage, 24-40 ranged damage)

Kingdom Rush: Frontiers[edit | edit source]

Archer Tower[edit | edit source]

  • Up KRF ImpAim.png Steady Hand (1 Star)
    • Increases marksmen attack range (by 10%).
  • Up KRF Lumbermill.png Lumbermill (1 Star)
    • Reduces basic archer construction costs. (-10 gold for level 1-3 archer towers).
  • Up KRF FocusAim.png Focused Aim (2 Stars)
    •  Increases marksmen attack damage. (1-2 damage).
  • Up KRF Accuracy.png Accuracy (2 Stars)
    • Increases marksmen attack range (by 5%) and damage.
  • Up KRF TwinShot.png Twin Shot (3 Stars)
    • Marksmen have a chance of shooting two projectiles at the same time. (10%)

Barracks[edit | edit source]

  • Up KRF Stance.png Defensive Stance (1 Star)
    • Barracks train soldiers with better armor. (+10% armor)
  • Up KRF BootCamp.png Boot Camp (1 Star)
    • Barracks train more resilient soldiers. [HP +10%]
  • Up KRF Espirt.png Esprit de Corps (2 Stars)
    • Increases barrack rally point range (+20%) and healing rate (+20% per second).
  • Up KRF Veteran.png Veteran Squad (2 Stars)
    • Soldiers are trained faster and with improved armor. (-2 seconds of respawn time, +10% armor of the main one)
  • Up KRF Courage.png Courage (3 Stars)
    • While in combat, soldiers, mercenaries & reinforcements regenerate 1% HP per second.

Magic Tower[edit | edit source]

  • Up KRF Rune.png Rune of Power (1 Star)
    • Increases mages' attack range (by 10%).
  • Up KRF Penetration.png Spell Penetration (1 Star)
    • Mages' bolts have a chance to ignore magic resistance. (10%)
  • Up KRF Eldritch.png Eldritch Power (2 Stars)
    • Increases mages' attack damage (by 10%).
  • Up KRF Academy.png Wizard Academy (2 Stars)
    • Reduces mages' special abilities costs by 10%.
  • Up KRF Brilliance.png Brilliance (3 Stars)
    • For every mage tower built, each mage tower gets a bonus to damage
Number of mage towers built Damage increment of each mage tower
1 0%
2 ~5%
3 ~10%
4 ~14%
5 ~18%
6 ~21%
7 ~24%
8 ~27%
9+ ~30%

Artillery[edit | edit source]

  • Up KRF Smoothbore.png Smoothbore (1 Star)
    • Increases artillery attack range (by 10%).
  • Up KRF Powder.png Alchemical Powder (1 Star)
    • Artillery has a chance of dealing maximum damage with no splash reduction. (by 10%)
  • Up KRF Ordnance.png Improved Ordnance (2 Stars)
    • Increases artillery attack damage (by 10%).
  • Up KRF Gnomish.png Gnomish Tinkering (3 Stars)
    • Reduces artilleries' special abilities reload times. (by 3 seconds)
  • Up KRF ShockAwe.png Shock and Awe (3 Stars)
    • Artillery towers have a 20% chance of stunning their targets for 2 seconds on every attack.

Rain of Fire[edit | edit source]

  • Up KRF Burning.png Burning Skies (2 Stars)
    • Increases meteor damage and reduces cooldown by 5 seconds.
  • Up KRF Scorched.png Scorched Earth (2 Stars)
    • Meteors set the ground on fire for 5 seconds, burning enemies walking over it.
  • Up KRF Hellfire.png Hellfire (3 Stars)
    • Adds 2 additional meteors and reduces cooldown by 5 seconds.
  • Up KRF Conflagration.png Conflagration (3 Stars)
    • Increases meteor damage and explosion radius (+25%) while doubling scorched earth effects.
  • Up KRF Cataclysm.png Cataclysm (3 Stars)
    • Increases meteor damage and rains 4 additional meteors at random locations all over the battlefield.

Reinforcements [edit | edit source]

  • Up KRF Trained.png Trained Volunteers (2 Stars)
    • Trained Volunteers have additional health and deal a little more damage. (50 HP, 1-3 damage)
  • Up KRF MenatArms.png Men-at-Arms (3 Stars)
    • Men-at-Arms have more health and wear good armor. (70 HP, 10% armor, 2-4 damage)
  • Up KRF Champion.png Champion (3 Stars)
    • Champions have even more health and wield great weapons. (90 HP, 20% armor, 3-6 damage)
  • Up KRF Sworn.png Sworn Blades (3 Stars)
    • Sworn Blades have the most health and wield dual weapons. (110 HP, 30% armor, 6-10 damage)
  • Up KRF Recurve.png Recurve Bow (4 Stars)
    • Gives reinforcements a ranged weapon that can target ground and flying enemies. (110 HP, 30% armor, 6-10 damage, 16-30 ranged damage)

Kingdom Rush: Origins[edit | edit source]

Archer Tower[edit | edit source]

  • KRO Upgrade A 01 Level-1.png Master Shooter (1 star)
    • Increases Archer attack damage.
  • KRO Upgrade A 02 Level-2.png Treesinged Bow (1 star)
    • Increases Archer attack range (by 10%).
  • KRO Upgrade A 03 Level-3.png Obsidian Heads (2 stars)
    • Archers deal maximum damage against unarmored targets.
  • KRO Upgrade A 04 Level-4.png Elven Training (2 stars)
    • Improves all Archer special abilities.
  • KRO Upgrade A 05 Level-5.png Bloodletting Shot (3 stars)
    • Archer attacks have a 15% chance of causing heavy bleeding, plus an increase of 10% of the Archer attack damage. In iOS, the attack damage does not increase when Bloodletting Shot is upgraded while the bleeding is still in effect.
Tower Maximum Bloodletting Damage
Hunter Arbor 23 (22 iOS)
Watcher Arbor 23 (22 iOS)
Sentinel Arbor 46 (44 iOS)
Arcane Archers 46 (44 iOS)
Golden Longbows Long-range shot: 161 (154 iOS)
Long-range shot combined with a "crit": 299 (286 iOS)
Short-range shot: 69 (66 iOS)
Short-range shot combined with a "crit": 115 (110 iOS)

Barracks[edit | edit source]

  • KRO Upgrade B 01 Level-1.png Elven Fencing (1 star)
    • Reduces basic barracks construction costs. (-10% for level 1-3 Barracks)
  • KRO Upgrade B 02 Level-2.png Expert Tactician (1 star)
    • Increases barracks rally point range. (by 20%)
  • KRO Upgrade B 03 Level-3.png Enchanted Armor (2 stars)
    • Barracks equip soldiers with improved armor. (+10%)
  • KRO Upgrade B 04 Level-4.png Moon Forged Blades (2 stars)
    • Soldier attacks deal 15% additional magic damage.
Tower Damage without Upgrade (with Upgrade)
Defender Barracks 1-4 (2-6)
Warden Barracks 3-7 (4-9)
Ranger Barracks 8-12 (10-14)
Bladesinger Hall 10-14 (13-17)
Forest Keepers 24-36 (28-42)
  • KRO Upgrade B 05 Level-5.png Blessing of Elynie (3 stars): Soldiers have a 10% chance of cheating death when dealt lethal damage. (Soldiers revive with full health when proced.)

Magic Tower[edit | edit source]

  • KRO Upgrade M 01 Level-1.png Crystal Focus (1 star)
    • Increases Mage attack range. (+5%)
  • KRO Upgrade M 02 Level-2.png Empowered Magic (1 star)
    • Increases Mage attack damage. (+17.5%)
  • KRO Upgrade M 03 Level-3.png Crystal Gazing (2 stars)
    • Increases Mage attack range (+5% from crystal focus)
  • KRO Upgrade M 04 Level-4.png Unstable Magic (2 stars)
    • Mage attacks have a small chance of dealing triple damage.
      • (Each bolt gets 5% chance and it is shown as a "BLAST!".)
  • KRO Upgrade M 05 Level-5.png Alter Reality (3 stars)
    • Mage attacks have a chance of teleporting enemies 20 node back down the path. (Wild Magus: 1%, High Elven Mage: 3%, the others: 10%)

Druid Tower[edit | edit source]

  • KRO Upgrade D 01 Level-1.png Hardened Boulders (1 star)
    • Increases Druid attack damage. (+10%)
  • KRO Upgrade D 02 Level-2.png Sharp Splinters (1 star)
    • Increases boulder explosion area.
  • KRO Upgrade D 03 Level-3.png Earth Mastery (2 stars)
    • Increases Druid attack range. (by 10%)
  • KRO Upgrade D 04 Level-4.png Heavy Load (3 stars)
    • Boulder explosions ignore physical armor.
  • KRO Upgrade D 05 Level-5.png Shocking Impact (3 stars)
    • Boulder explosions slow enemies for a short time. (by 50% for 0.5 second)

Thunderbolt[edit | edit source]

  • KRO Upgrade Th 01 Level-1.png Thunderbolt (2 stars)
    • Adds 3 additional thunderbolts.
  • KRO Upgrade Th 02 Level-2.png Roaring Gale (2 stars)
    • Increases thunderbolt damage and reduces cooldown by 10 seconds.
  • KRO Upgrade Th 03 Level-3.png Thunderstorm (3 stars)
    • Adds 2 additional thunderbolts, while heavy winds slow down all enemies.
  • KRO Upgrade Th 04 Level-4.png Monsoon (3 stars)
    • Increases thunderbolt damage and doubles wind slowing effect.
  • KRO Upgrade Th 05 Level-5.png Furious Tempest (3 stars)
    • Increases thunderbolt damage and casts additional bolts at random enemies.

Reinforcements[edit | edit source]

  • KRO Upgrade R 01 Level-1.png Skilled Defenders (2 stars)
    • Skilled defenders have more health and better equipment.
      • (60 HP, 3-5 damage, 20% armor)
  • KRO Upgrade R 02 Level-2.png Elven Stars (3 stars)
    • Gives reinforcements a ranged weapon that can target ground and flying enemies.
      • (60 HP, 20% armor, 3-5 damage, 7-10 ranged damage)
  • KRO Upgrade R 03 Level-3.png Green Wardens (3 stars)
    • Green Wardens have more health, better armor and improved weapons
      • (100 HP, 35% armor, 5-10 damage, 10-20 ranged damage)
  • KRO Upgrade R 04 Level-4.png Rapid Response (3 stars)
    • Reduces reinforcements cooldown by 5 seconds.
      • (From 15 seconds to 10 seconds.)
  • KRO Upgrade R 05 Level-5.png Moon Sentinels (4 stars)
    • Moon sentinels are elite elven huntresses, riding giant panthers.
      • (150 HP, 50% armor, 10-15 damage, 20-30 ranged damage)

Kingdom Rush: Vengeance[edit | edit source]

Upgrade Points[edit | edit source]

Upgrades in Kingdom Rush: Vengeance are bought with Upgrade Points instead of Stars and are gained differently to previous games. Unlike in previous games, upgrade points are exclusively earned from Campaign mode; completing Heroic and Iron Challenges give no upgrade points. The number of upgrade points earned is independent of stars; no matter how many lives the player finishes the stage with, the number of upgrade points is always the same. Most stages grant three upgrade points upon completion, with the exception of the following:

Towers[edit | edit source]

  • KRVUp Blitz.png BLITZ TACTICS (1 upgrade point): Increases the bonus gold for calling an early wave. (80% additional gold)
    • KRVUp Rations.png WAR RATIONS (1 upgrade point): With a full belly, Barracks units have improved health. (30% additional HP)
    • KRVUp GXR1.png GXR-1 TARGETING SYSTEM (2 upgrade points): Improved with Goblin technology, Archery towers gain extra range. (5% additional range)
    • KRVUp Bombs.png BIGGER BOMBS (1 upgrade point): Infused with powerful alchemy, explosions now have a bigger range of effect. (20% additional area of effect)
    • KRVUp Runes.png RUNES OF POWER (2 upgrade points): All mage towers have a slight chance of dealing double damage on each attack. (10% chance of double damage)
  • KRVUp Guild.png GUILD OF MERCHANTS (2 upgrade points): Costs of towers' special skills is now reduced. (15% cost reduction)
    • KRVUp Master.png MASTER ARCHITECTS (2 upgrade points): All towers gain extra bonus damage. (10% additional basic attack damage)
    • KRVUp Coils.png DEATHRAY COILS (4 upgrade points): Replace the flags on each exit with deadly tesla coils that zap incoming enemies. These coils can zap enemies every 180 seconds for 150-300 true damage.

Heroes[edit | edit source]

  • KRVUp Backto.png BACK TO BATTLE (1 upgrade point)
    • Reduces the respawn time of Heroes. (10% respawn reduction)
  • KRVUp Special.png SPECIAL TRAINING (1 upgrade point)
    • Thanks to a secret and intense training heroes level up faster. (25% extra XP gain)
  • KRVUp Oneman.png ONE MAN ARMY (2 upgrade points)
    • All heroes improve their base attack damage. (15% extra damage)
  • KRVUp Ultimate.png ULTIMATE POWER (1 upgrade point)
    • All heroes' Ultimate skills now have their cool downs reduced. (20% CD reduction)
  • KRVUp Will.png IRON WILL (2 upgrade points)
    • All heroes improve their maximum health. (20% HP increase)
  • KRVUp Shield.png SHIELD OF PROTECTION (2 upgrade points)
    • Every basic attack inflicted to a hero has a small chance of dealing no damage. (10% chance to trigger)
  • KRVUp SWind.png SECOND WIND (4 upgrade points)
    • Heroes now have a small chance of instantly respawning. (10% chance to trigger)

Demon Goonies[edit | edit source]

  • KRVUp Infernal.png INFERNAL COMBUSTION (1 upgrade point): After dying, Goonies explode dealing 20 physical damage in an area of 90.
  • KRVUp Trained.png TRAINED GOONIES (2 upgrade points): Better trained for combat, Goonies now have improved health and damage.
  • KRVUp Guards.png DEMON GUARDS (3 upgrade points): Goonies are now Demon Guards! They are capable of withstanding huge amounts of damage. Mutually exclusive with Hellion Tridents. (Infernal Combustion: 10 physical damage in an area of 90)
    • KRVUp Nova.png INFERNAL NOVA (2 upgrade points): Demon Guards now die with a bigger explosion. Deals 40 physical damage in an area of 120.
  • KRVUp Hellion.png HELLION TRIDENTS (3 upgrade points): Goonies are now Hellon Tridents! They are demons that can hit their enemies with a ranged attack. Mutually exclusive with Demon Guards. (Infernal Combustion: 20 physical damage in an area of 90)
    • KRVUp Tridents.png FLAMING TRIDENTS (2 upgrade points): Hellion Tridents now throw burning tridents that burn enemies on impact for a brief duration. (Burn damage: 10 physical damage over 2 seconds)
  • KRVUp PitLord.png PIT LORD (6 upgrade points): When reinforcements are called to the battlefield, now there's a 30% chance of summoning a Pit Lord with them. (Infernal Combustion: 50 explosive damage in an area of 90)

Soul Impact[edit | edit source]

  • KRVUp XImpact.png EXTRA IMPACTS (2 upgrade points): When the spells cast, adds an extra impact near the place the first one hit.
    • KRVUp SShock.png SOUL SHOCKWAVE (1 upgrade point): The impact now stuns the affected enemies for 0.4 second.
  • KRVUp Call.png CALL OF THE DAMNED (3 upgrade points): After the impact, releases 2 spectres each that chase and deal 7-22 damage to enemies.
    • KRVUp XSpect.png EXTRA SPECTRES (2 upgrade points): Soul impacts now release at most 4 spectres when they hit
    • KRVUp Fear.png FEAR OF THE DAMNED (1 upgrade point): Enemies hit by the spectres move at 50% of their speed for 2 seconds.
  • KRVUp Feast.png FEAST OF THE DAMNED (1 upgrade point): Each enemy killed by this spell reduces the cool down for the next cast.
  • KRVUp Echoes.png SOUL ECHOES (3 upgrade points): After the impact ends, there is a 25% chance of it striking again in the same place.
  • KRVUp Tornado.png TORNADO OF SOULS (5 upgrade points): When the spell is cast, 2 extra impacts will fall across the battlefield.

See Also[edit | edit source]

Upgrade Strategy

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