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This article is about the level in Kingdom Rush. For the tower in Kingdom Rush: Vengeance, see Rotten Forest (Tower).
"Summon your troops, General! The forces of darkness are relentless in their attacks against our beloved kingdom, and we must take action. Reports indicate that the area known as the Rotten Forest is indeed rotten; as a portal to the netherworld has opened in the midst of the woods.
The dead find no rest in this forest, and vegetation turns against any who wander into it. You must lead your forces into the Rotten Forest and get to the root of the problem!"

Rotten Forest is the fifteenth stage in Kingdom Rush. It requires the Premium Content in the Flash version. It was originally introduced as a stand-alone level, but since the release of Fungal Forest it is now part of a mini-campaign. It is stand-alone in flash, since Fungal Forest will not appear after a player completed this stage successfully.

Campaign

Set-Up

Wave Composition

Wave Enemies
(South)
Enemies
(North)
Enemies
(Gateway)
Income
1 Husk x10 100
2 Giant Spiders x25 150
3 Husk x13 Giant Spiders x20 250
4 Gargoyle x8 Gargoyle x8 192
5 Demon Spawn x18 360
6 Husk x20 Giant Spiders x10
Spider Matriarch x4
Noxious Creeper x2
420
7 Husk x30 Noxious Creeper x5 500
8 Demon Spawn x20
Demon Hound x5
Demon Lord x2
645
9 Gargoyle x12 Gargoyle x18 Demon Imp x10 610
10 Tainted Treant x11 660
11 Tainted Treant x8 Tainted Treant x8 960
12 Tainted Treant x6 Tainted Treant x6 Demon Hound x10 970
13 Swamp Thing x3 Swamp Thing x2 1000
14 Gargoyle x20 Gargoyle x20 Demon Imp x20 980
15 Husk x20
Swamp Thing x2
Noxious Creeper x5
Swamp Thing x2
1200
16 Necromancer x6
Swamp Thing x2
Necromancer x6
Swamp Thing x2
1400
17 Demon Spawn x55
Demon Hound x20
Demon Lord x2
1720
18 Tainted Treant x5
Swamp Thing x2
Necromancer x6
Swamp Thing x2
Demon Hound x16
Demon Lord x2
1920
19 Swamp Thing x6 Swamp Thing x6 2400
20 Tainted Treant x20 Greenmuck
Tainted Treant x20
Demon Spawn x46
Demon Lord x3
3500

Note: From Wave 11, additional Tainted Treants will randomly emerge from the ground anywhere in the level. These Treants do not give Gold when defeated.

Strategy

General

  • Swamp Thing has area ranged attack that can easily kill your reinforcements and hero, so try to kill them as quickly as possible. It can often be worth sacrificing some Reinforcements to stall a Swamp Thing temporarily, allowing you to drop a Rain of Fire directly on top of the beast and inflict a massive amount of damage.
  • Rangers Hideout's Poison Arrows damage ignores armor and reduces regeneration from Swamp Thing. Combined with Wrath of the Forest to stall and further damage enemies, it's a lethal combination.
  • In later waves, there are more Tainted Treants, so it's suggested to build more Magic Towers than Archers.
  • Don't be afraid to sell towers that aren't working.
  • At the start of the level, Towers require quality over quantity. Build a few high levelled towers, rather than building lots of low levelled ones.

Upgrades and Hero

  • Use heroes that have a combination of high health and high armor.
  • If you don't have enough stars to upgrade everything in the Upgrade Tree, don't worry about upgrading barracks (since they are not recommended in the level as if they die, Husk spawn from the Poison Pool).

Towers

  • At the right side of the battlefield, it's best to use Archers as all of the enemies that spawn from that entrance are Demons, and all of them are resistant to magic.
  • Because Tainted Treant spawn randomly, magic towers are the best to deal with them. The Sorcerer Mage is the best option, due in part to its faster attack speed, but also its innate curse ability to not only lower enemy armor but also target a different enemy in range if one is already cursed.
  • An Arcane Wizard near the exit can help deal with already weakened enemies, and later its Teleport and Death Ray are essential.
  • Resist the use of Melee towers and Elementals, as if they die, the Poison Pool will spawn Husks and Swamp Things, respectively.
    • If you find you are in need of Barracks, then Holy Order are the best option, with Shield of Valor a must.
  • Place a Tesla x104 on corners where it overlaps with a lot of the path, so it can strike multiple enemies at once with Overcharge.

Heroic Challenge

Set-Up

Wave Composition

Wave Enemies
(South)
Enemies
(North)
Enemies
(Gateway)
Income
1 Giant Spiders x45
Tainted Treant x3 Demon Hound x1
Demon Imp x5
600
2 Tainted Treant x4 Demon Imp x12
Demon Spawn x14
820
3 Necromancer x6 Tainted Treant x11 960
4 Swamp Thing x2 Tainted Treant x16 1360
5 Swamp Thing x3 Tainted Treant x13 Demon Hound x28 2080
6 Tainted Treant x16
Swamp Thing x1
Tainted Treant x16
Swamp Thing x1
Demon Imp x40 3320

Strategy

General

Upgrades and Hero

Towers

Iron Challenge

Set-Up

Wave Composition

Wave Enemies
(South)
Enemies
(North)
Enemies
(Gateway)
Income
1 Husk x103
Tainted Treant x27
Swamp Thing x2
Husk x103
Tainted Treant x27
Swamp Thing x2
Demon Imp x16
Demon Spawn x66
Demon Hound x48
Demon Lord x3
9200

Strategy

General

Upgrades and Hero

Towers

Events

Warning!
KR EliteStage This is a stage of extreme difficulty...
Over 50 stars are recommended to face this stage.
New Enemy
Wave 1
Husk
EnemySqr Husk

Fallen warriors, their bodies claimed by the forest, they are now only husks of their former selves.

  • Slow speed
  • Medium armor
New Enemy
Wave 6
Noxious Creeper
EnemySqr Noxious Creeper

An aggressive predator, that hatches mutated spiderlings to feed on their prey

  • High magic resistance
  • Spawns spiderlings
  • Costs 3 lives
New Enemy
Wave 10
Tainted Treant
EnemySqr Treant

With steel-hard bark, these corrupted beings were once protectors of the forest.

  • High armor
  • tough
New Enemy
Wave 15
Swamp Thing
EnemySqr Swamp

A mass of vegetable matter that comes from the vilest and most tainted of places.

  • Very tough
  • Ranged attack
  • Regeneration

Related Achievements

Lumberjack LUMBERJACK Defeat Greenmuck and his minions.

Levels • Kingdom Rush
Main Campaign SouthportThe FarmlandsPagrasTwin RiversSilveroak ForestThe CitadelColdstep MinesIcewind PassStormcloud TempleThe WastesForsaken ValleyThe Dark Tower
Elite Ruins of AcarothSarelgaz's LairRotten ForestFungal ForestHushwoodBandit's LairGlacial HeightsHa'Kraj PlateauPit of FirePandaemoniumRotwickAncient NecropolisNightfang SwaleCastle Blackburn
Endless Rage Valley
Levels • Kingdom Rush: Frontiers
Main Campaign HammerholdSandhawk HamletSape OasisDunes of DespairBuccaneer's DenNazeru's GatesCrimson ValleySnapvine BridgeLost JungleMa'qwa UrquTemple of SaqraThe UnderpassBeresad's LairThe Dark DescentEmberspike Depths
Elite Port TortugaStorm AtollThe Sunken CitadelBonesburgDesecrated GroveDusk ChateauDarklight Depths
Endless Ruins of Nas'DeTemple of Ethereal Evil
Levels • Kingdom Rush: Origins
Main Campaign Gray RavensThe High CrossWaterfall TrailsRedwood StandRoyal GardensGryphon PointRockhengeGrimmsburgThe Crystal LakeNeverwonderThe Unseelie CourtThe AscentArcane QuartersMactans' RetreatShrine of Elynie
Elite Galadrian's WallBlood QuarryBeheader's SeatDuskwood OutpostDuredhel OutskirtsDwaraman GatesTainted Pit
Endless Valor's RestTwilight Invasion
Levels • Kingdom Rush: Vengeance
Main Campaign Vez'nan's TowerDwarven GateCorridors of the Old CityKazan MinesGolden BreweryClockwork FactoryBolgur's ThroneNortherners' OutpostFrozen RapidsNortherners' VillageDragons' BoneyardJokull's NestOtil FarmlandsSilveroak OutpostCity of LozagonLightseeker CampDenas's Castle
Elite Maginicia ShoresAnurian PlazaPond of the SageBreaking the IceInto the MountainsThe Frozen ThroneBack To The Rotten ForestA Night In The SwampThe Ancient Ghosts
Endless
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