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It seems that the Temple of Saqra was merely the entrance to a vast underground labyrinth, carved into the mountain rock itself! There might just be some truth to the legends that warn about an unspeakable evil here...
We must head into the maze, for our mission cannot be abandoned. If only the overwhelming darkness were a lll we had to face...

The Underpass is the twelfth level in  Kingdom Rush: Frontiers.

Scenery

Waves

Campaign

Wave Enemies
(Northeast)
Enemies
(Northeast > N.Cave)
Enemies
(South)
Enemies
(South > S.Cave)
Enemies
(Western Pit)
Income
1 Saurian Broodguard x6 Saurian Broodguard x6 240
2 Saurian Broodguard x8 Saurian Broodguard x8 320
3 Saurian Nightscale x7 Saurian Broodguard x9 355
4 Saurian Nightscale x6 Saurian Broodguard x4 Saurian Broodguard x11 450
5 Saurian Razorwing x10 Saurian Razorwing x10 200
6 Saurian Nightscale x12 Saurian Nightscale x12 600
7 Saurian Broodguard x6
Saurian Nightscale x4
Saurian Broodguard x6 Saurian Broodguard x6
Saurian Nightscale x4
Saurian Broodguard x6 680
8 Saurian Nightscale x9 Saurian Broodguard x10 Saurian Nightscale x9 Saurian Broodguard x10 850
9 Saurian Razorwing x25 Saurian Razorwing x25 500
10 Saurian Broodguard x20 Saurian Myrmidon x6 Saurian Broodguard x15 1000
11 Saurian Broodguard x14
Saurian Nightscale x8
Saurian Broodguard x10 Saurian Nightscale x8
Saurian Myrmidon x8
1280
12 Saurian Broodguard x10
Saurian Myrmidon x4
Saurian Broodguard x10
Saurian Myrmidon x4
Saurian Broodguard x35 1500
13 Saurian Nightscale x6
Saurian Myrmidon x9
Saurian Nightscale x6
Saurian Myrmidon x9
Saurian Nightscale x20 1700
14 Saurian Broodguard x18
Saurian Myrmidon x7
Saurian Broodguard x10 Saurian Broodguard x18
Saurian Myrmidon x7
Saurian Broodguard x10 Saurian Broodguard x10 2020
15 Saurian Broodguard x4
Saurian Nightscale x9
Saurian Myrmidon x8
Saurian Brute x1
Saurian Nightscale x9
Saurian Myrmidon x1
Saurian Broodguard x4
Saurian Nightscale x9
Saurian Myrmidon x8
Saurian Brute x1
Saurian Nightscale x9
Saurian Myrmidon x1
Saurian Nightscale x20 2860

Heroic Challenge

Wave Enemies
(Northeast)
Enemies
(Northeast > N.Cave)
Enemies
(South)
Enemies
(South > S.Cave)
Enemies
(Western Pit)
Income
1 Saurian Broodguard x12 Saurian Broodguard x20 640
2 Saurian Broodguard x16 Saurian Broodguard x13
Saurian Nightscale x8
Saurian Razorwing x5
Saurian Broodguard x10
1030
3 Saurian Broodguard x16
Saurian Myrmidon x2
Saurian Razorwing x5
Saurian Broodguard x8
Saurian Myrmidon x3
Saurian Broodguard x21 1200
4 Saurian Broodguard x25 Saurian Broodguard x12 Saurian Nightscale x6 Saurian Myrmidon x28 Saurian Broodguard x20 2690
5 Saurian Broodguard x27
Saurian Myrmidon x8
Saurian Nightscale x23 Saurian Broodguard x6
Saurian Myrmidon x7
Saurian Broodguard x40 Saurian Razorwing x6
Saurian Broodguard x23
3305
6 Saurian Myrmidon x18 Saurian Nightscale x33 Saurian Myrmidon x18 Saurian Broodguard x45 Saurian Broodguard x30 4125

Iron Challenge

Wave Enemies
(Northeast)
Enemies
(Northeast > N.Cave)
Enemies
(South)
Enemies
(South > S.Cave)
Enemies
(Western Pit)
Income
1 Saurian Nightscale x58
Saurian Myrmidon x5
Saurian Broodguard x35
Saurian Nightscale x14
Saurian Nightscale x43
Saurian Myrmidon x6
Saurian Nightscale x21

Saurian Myrmidon x6

Saurian Razorwing x24
Saurian Broodguard x12
5430

Events

New Enemy
Wave 1
Saurian Broodguard
EnemySqr SBroodguard

Fearless lizard-like warrirors, their wounds fuel their combat rage, making them faster.

  • Walks faster as it gets injured
New Enemy
Wave 3
Saurian Nightscale
EnemySqr SNightscale Cunning warriors that can become invisible to get past defenses.


  • Can use invisibility
  • High damage
  • Magic resistance
New Enemy
Wave 5
Saurian Razorwing
EnemySqr Razorwing Tamed and trained by the saurians to be used as aerial hunters.


  • Fast speed
  • Flying
New Enemy
Wave 10
Saurian Myrmidon
EnemySqr SMyrmidon Ferocious elite warriors that fight with sword and fang alike!


  • Heavy armor
  • Average speed
  • Can bite to regain health
New Enemy
Wave 15
Saurian Brute
EnemySqr SBrute Towering, unstoppable angry reptiles, armed with energy whips!


  • Very tough
  • Area attack
  • Slow speed
Kingdom Rush: Frontiers (Levels)
Frontiers Logo
Campaign
HammerholdSandhawk HamletSape OasisDunes of DespairBuccaneer's DenNazeru's GatesCrimson ValleySnapvine BridgeLost Jungle

Ma'qwa UrquTemple of SaqraThe UnderpassBeresad's LairThe Dark DescentEmberspike Depths

Rising Tides
Port TortugaStorm AtollThe Sunken Citadel
Shadowmoon
BonesburgDesecrated GroveDusk Chateau
Stand Alone
Darklight Depths
Endless
Ruins of Nas'DeTemple of Ethereal Evil