The Citadel

: "After several days of travel, we have arrived at our capital city of Linirea. The time has come to make a stand, and defend Linirea's southern walls.
: In addition to your highly experienced units, the King adds two units to your batallions(sic). The Arcane Wizards will provide superior firepower, and the pious Paladins will inspire the troops with their bravery."
The Citadel is the sixth level in the game comprised of seventeen waves and the first to feature a Boss. The player starts with 700 Gold and fifteen Strategic Points to build on. Unlike any other level to date, this scenario features seven Imperial Guards divided into three squads covering the most important choke points. The map features four points of entry; two to the west and the east, each leading enemies along the respective side routes, and two to the south leading through the central route passing the first line of defence on both sides.
==Campaign==
===Set-Up===
* Gold 700
* Strategic Point ×15
* Imperial Guard ×7
===Wave Composition===
KRstage06-1.jpg
Wave	Enemies(West) 	Enemies(South > West) 	Enemies(South > East) 	Enemies(East) 	Income
1 	Bandit x7 	 	 	Bandit x7 	112
2 	 	Brigand x5 	Brigand x5 	 	150
3 	Dark Knight x1 	 	 	Dark Knight x1 	50
4 	 	Goblin x12Orc x12Shaman x5 	Goblin x12Orc x12Shaman x5 	 	388
5 	Gargoyle x5 	 	 	Gargoyle x5 	120
6 	 	Brigand x7Marauder x1 	Brigand x7Marauder x1 	 	290
7 	Bandit x6Shadow Archer x3 	 	 	Bandit x6Shadow Archer x3 	192
8 	Worg x6 	Shadow Archer x6 	Shadow Archer x6 	Worg x6 	336
9 	Gargoyle x12 	 	 	Gargoyle x12 	288
10 	 	Goblin x15Orc x17Shaman x6Ogre x1	Goblin x15Orc x17Shaman x6Ogre x1	 	616
11 	 	Dark Knight x5 	Dark Knight x5 	 	250
12 	Shadow Archer x4 	Dark Knight x7 	Dark Knight x7 	Shadow Archer x4 	478
13 	Shadow Archer x6 	Marauder x1Dark Knight x6 	Marauder x1Dark Knight x6 	Shadow Archer x6 	572
14 	Goblin x20Ogre x3Wulf x10 	 	 	Goblin x20Ogre x3Wulf x10 	520
15 	 	Gargoyle x15 	Gargoyle x15 	 	360
16 	Marauder x3Dark Knight x6Shadow Archer x4	 	 	Marauder x3Dark Knight x6Shadow Archer x4	668
17 	 	 	 	The Juggernaut 	
The Flash version has some slightly different waves. Those are as follows.
Wave	Enemies(West) 	Enemies(South > West)	Enemies(South > East)	Enemies(East) 	Income
11 	Dark Knight x4 	 	 	Dark Knight x4 	200
12 	Shadow Archer x3	Dark Knight x6 	Dark Knight x6 	Shadow Archer x3	396
Strategy
===General===
* This level introduces you to the first heavily armored enemy in the game - Dark Knight (80% armor). Using magic damage to fight them is absolutely necessary.
===Upgrades and Hero===
* Arcane Shatter can help towers with physical damage contribute to killing armored enemies (decreases enemy’s armor by 3% with each attack). This would let you build less Mage Towers to pass the level.
* Gerald Ligthseeker is the preferred choice in this level. You can either use him in choke points to buff other units with Courage, or have him somewhere away from the main action to duel enemies 1 on 1. His Shield of Retribution ability, doing true damage to enemies, is very effective against Dark Knights.
===Towers===
* The best places to organize choke points for enemies are the first path joints, where 2 Imperial Guards are standing on each side of the map. This place is in reach of 4 tower spots, enabling you to use more varied strategies.
* Remember to place at least 1 Mage Tower on each side to deal with armored enemies, such as Brigands, Marauders and Dark Knights.
* At the same time, don't get carried away with magic damage. The level also includes a lot of non-armored enemies, using Archer or Artillery towers is generally more cost effective against them.
* One of The Juggernaut's abilities is shooting projectiles with 7 Golem Heads. He can shoot them to any part of the level before the last path joint. Thus, you need to ensure you have Barracks and Archers / Artillery towers to kill them at the back of the level. These enemies are not very hard to deal with, so you don’t need to organize strong defenses there.
==Heroic Challenge==
===Set-Up===
* Gold 1200
* Strategic Point ×15
* Imperial Guard ×7
**Restriction: Heroes are not allowed
**Restriction: Upgrades above Level 3 are not allowed.
===Wave Composition===
KRstage06-2.jpg
Wave	Enemies(West) 	Enemies(South > West) 	Enemies(South > East) 	Enemies(East) 	Income
1 	 	Bandit x10Brigand x6Dark Knight x4 	Bandit x10Brigand x6Dark Knight x4 	 	540
2 	Gargoyle x12 	 	 	Gargoyle x12 	288
3 	Bandit x18 	Brigand x10Dark Knight x4 	Brigand x10Dark Knight x3 	Bandit x18 	763
4 	Marauder x3 	Brigand x29 	Brigand x29 	Marauder x3 	1110
5 	Worg x10 	Dark Knight x24Shadow Archer x5 	Dark Knight x24Shadow Archer x5 	Worg x10 	1600
6 	Brigand x10Marauder x4Shadow Archer x6	Marauder x2Dark Knight x14Shadow Archer x8	Marauder x2Dark Knight x14Shadow Archer x8	Brigand x10Marauder x4Shadow Archer x6	1928
Note: the asymmetrical wave design on wave 3 is not an error and is present in this form in the game.
Strategy
===General===
===Upgrades and Hero===
===Towers===
==Iron Challenge==
===Set-Up===
* Gold 800
* Strategic Point ×13
* Wizard Tower ×2
**Restriction: Heroes are not allowed.
**Restriction: Upgrades above Level 3 are not allowed.
**Restriction: only.
===Wave Composition===
KRstage06-3New.png
Wave	Enemies(West) 	Enemies(South > West) 	Enemies(South > East) 	Enemies(East) 	Income
1 	Goblin x26Orc x20Brigand x22Shaman x3Marauder x3Dark Knight x6	Goblin x26Orc x20Brigandx22Shaman x3Marauder x5Dark Knight x6	Goblin x26Orc x20Brigand x22Shaman x3Marauder x5Dark Knight x6	Goblin x26Orc x20Brigand x22Shaman x3Marauder x3Dark Knight x6	3712
Strategy
===General===
===Upgrades and Hero===
===Towers===
== Events ==
New TowerUnlocked	Level 4 Mage TowerArcane Wizard
 	Very high damage, excellent against armored enemies                  
New TowerUnlocked	Level 4 BarracksHoly Order
 	Spawns Paladins with full plate armor that can block enemies longer                
Heavily Armored Enemies!	Heavily Armored Enemies!
250px|link=:Category:Magic TowersSome enemies wear heavy armor and are almost impervious to physical damage, in order to kill them hit them with magic attacks!	
250px|link=:Category:Magic TowersSome enemies wear heavy armor and are almost impervious to physical damage, in order to kill them hit them with magic attacks!
New EnemyWave 3	Dark Knights
 	Full plated corrupted knights, almost impervious to physical damage.
* Slow speed
* Heavy armor
New EnemyWave 5	Gargoyles
 	Vile winged creatures that can fly past Barracks and Artillery.
* Flying
* Average speed
New EnemyWave 7	Shadow Archers
 	Deadly accurate archers that will shoot at nearby soldiers in their path.
* Ranged attack
* Low magic resistance
* Average speed
==Related Achievements==
 IMPERIAL SAVIOUR
Complete The Citadel with at least 3 surviving Imperial Guards.
 NUTS AND BOLTS
Defeat The Juggernaut.
Category:Kingdom Rush
Category:Levels