Slow Boss

ARTICLE

ADVANCED STATSADV. STATS

---

Similar Article

This article is about Slow Boss. You may be looking for Slow, Mega Slow, Chained Boss, Giant Boss or Slow King.

Slow Boss
Mode Appearance	Easy Casual Legacy Molten Basic Arena PVP Challenges Boss Rush Events SFOTH The Classic Mission 1 The Classic Mission 3 The Classic Mission 5 The Takeover (Noob)
Wave Debut	16 (Easy, Casual & Basic Arena PVP) Originally: 12 (The Heights) 9 (Classic Candy Cane Lane, Classic Forest Camp & The Takeover Noob) 10 (Classic Castle)
Statistics
Base Health	1,750 (Easy) 1,800 (Casual) 1,600 (Basic Arena PVP) 2,000 (Sandbox) Challenges 2,000 (Boss Rush)
Defense	25%
Speed	Slow (1.9)
Cash Given	$300 every 25% health
Spawned By	Mystery Boss (Legacy Molten, Wave 23 onwards) Super Mystery (Formerly) Uber Mystery (Formerly) Swordmaster (Formerly)
Hidden?	No
Flying?	No
Ghost?	No
Lead?	No
Attributes	Bloated (Variable) Nimble (Variable) Boss Immunities: Freeze Immunity Stun Immunity Poison Slowdown Confusion Thorn Slowdown Nuke Fallout Damage DJ Booth Slowdown Defense Dropping Hacker Conversion Hacker Slowdown
Base Health	1,600
Speed	Slow (1.5)
Cash Given	$5 on death
Spawned By	Mystery Boss (Legacy Molten, Wave 23 onwards) Swordmaster Super Mystery (Formerly) Uber Mystery (Formerly)
Hidden?	No
Flying?	No
Ghost?	No
Lead?	No
Attributes	None
PVP
Send Cost	$750
Send Cost	$750
Wave Unlock	23
Wave Unlock	23
Economy Bonus	$-10
Economy Bonus	$-10
Send Number	1
Send Number	1
Spawn Timer	2
Spawn Timer	2
Stat Changes	2,800 Health
Stat Changes	2,800 Health

• Current
• The Takeover Event
• Translated
• April Fools 2022
• Version 1

"Can you feel the ground shake? Something big is almost here...
Give it all you got! Take it down!"

―Commander dialogue on Wave 16 (Easy)

"Don't be alarmed, a Slow Boss has made an entrance!
We'll need a lot of firepower to take it down!"

―Commander dialogue on Wave 16 (Casual)

"Loud thuds in the distance? I don't like what I'm hearing...
It sounds like something huge is coming! Prepare!"

―Commander dialogue on Wave 22 (Legacy Molten)
Commander dialogue on Wave 16 (Formerly, Easy)

"Their numbers are beginning to thin out, but stay alert.
You're doing great."

―Commander dialogue on Wave 9 (The Takeover Event, Noob)

"distant voice? I don't like what I hear.
This is a beautiful thing! Portable!"

―Commander dialogue on Wave 16 (Translated Easy)
Commander dialogue on Wave 22 (Translated Molten)

"Woud thuds in the distance? I don't wike what I'm heawing.. (･ω･ `)...........
It sounds wike something huge is coming! Pwepawe! (☉_☉) "

―Commander dialogue on Wave 16 (April Fools 2022 Normal)
Commander dialogue on Wave 22 (April Fools 2022 Molten)

"Get ready for a HUGE boss!"

―Beginning of Wave 16 (Pre-Overhaul, Beginner's)
Beginning of Wave 22 (Pre-Overhaul, Molten)
Beginning of Wave 23 (Pre-MEGA)

Description

The Slow Boss, previously known as Boss2, is a slow and tough boss that appears in the Easy, Casual, Legacy Molten and Basic Arena PVP modes. It also appeared in the SFOTH Event, The Classic Event and The Takeover Event. Though the Slow Boss is slower than the Normal Boss and Necromancer, its high health makes it a considerable threat. Later on in the game, it will appear in large, mostly packed, hordes, causing many problems if you lack high DPS towers.

The Slow Boss can be spawned by the Mystery Boss upon its death in the Legacy Molten and Easy modes. In Easy mode, the Grave Digger used to rarely spawn the Slow Boss. The Slow Boss could also have been spawned by the Swordmaster.

Appearance

• Modern
• Legacy

• Current
• Version 1

The current version of the Slow Boss is a large humanoid with a waist, lower arms and lower legs in its rig. It has a desaturated dark green skin color and a light brown torso, waist and legs. It is faceless and is lightly covered in dirt.

The first version of the Slow Boss was a humanoid with a waist, lower arms and lower legs in its rig. It had a dark green skin color, and a light brown torso, waist and legs, which were all coated in dirt. It was faceless.

• Current
• Current (Enemies Beta)
• Version 2
• Version 1

The current version of the legacy Slow Boss has a desaturated green skin color and a diagonal scar going across its face. It has a grey pebble torso and legs. It has green hooks on its torso and right arm and has large tumors on its left arm. Its torso occasionally emits green particles. Its head is slightly tilted downwards and it has a twisted left leg.

It makes a dry roaring sound on death.

The current Enemies Beta version of the legacy Slow Boss is a humanoid with a waist, lower arms and lower legs in its rig. It has a dark green skin color, and a light brown torso, waist and legs, which are all coated in dirt. It is faceless.

It makes a dry roaring sound on death.

The second version of the legacy Slow Boss is similar to the current version, except it had glowing red eyes with a mouth closed by teal stitches.

The first version version of the legacy Slow Boss had a dark green skin color and a dark grey corroded torso and dark brown corroded legs. It had a drooling zombie face with glowing red eyes. It also emitted green particles from its torso.

Strategy

• Many towers can be used to deal with the Slow Boss on its debut.
  • High-DPS towers like the Minigunner and Turret are able to defeat the Slow Boss rather quickly.
  • Stronger early game towers like the Golden Scout, Militant, Soldier, Crook Boss, Ace Pilot and Cowboy, when upgraded to higher levels are strong options against the Slow Boss.
• Multiple towers can take advantage of the Slow Boss' slow speed.
  • Short-ranged towers like the Assassin are able to get many more hits in, making them more effective.
  • The Military Base and Crook Boss' units will have more time to shoot at the Slow Boss before colliding into it.
  • The Brawler on levels 2 and above is able to stunlock multiple Slow Bosses.
• Though not necessary, all stalling towers will work against the Slow Boss, and can slow it down significantly.
  • However, the first Slow Boss in Easy mode is a Boss enemy. This means it is either fully or partially unaffected by all forms of stalling.
  • Do note that the Slow Boss large size makes the freezing, knockback and stunning towers like Freezer, Brawler and Warden less effective than usual.

Gallery

Previous Variants (Modern)

First version (24 February 2024 – 25 September 2024)

Previous Variants (Legacy)

Second version, second animation (29 October 2020 – 8 May 2021)

Second version, first animation (15 July 2019 – 29 October 2020)

First version (14 June 2019 – 15 July 2019)

Animations (Modern)

Current version, current walk animation (25 September 2024 – Present)

Animations (Legacy)

Current version, current walk animation (8 May 2021 – Present)

Converted Variants (Modern)

Green variant, current version (11 June 2025 – Present)

Overclock variant, current version (11 June 2025 – Present)

Corpse Variants (Modern)

Second Corpse variant, current version (12 March 2025 – Present)

Corpse Variants (Legacy)

Second Corpse variant, current version (12 March 2025 – Present)

Thumbnails

Slow Boss on the game thumbnail.

Slow Boss on the game thumbnail.

Slow Boss on the game thumbnail.

Slow Boss on the game thumbnail.

Icons

Boss2 on the game icon.

Boss2 on the game icon.

Boss2 on the game icon.

Promotional Images

Slow Boss on a promotional image.

Slow Boss on a promotional image.

Slow Boss on a promotional image.

Promotional Videos

Entity System - Tower Defense Simulator

Slow Boss on a promotional video.

Rocketeer Rework - Tower Defense Simulator

Slow Boss on a promotional video.

Swarmer Rework - Tower Defense Simulator

Slow Boss on a promotional video.

Assassin Tower Trailer - Tower Defense Simulator

Slow Boss on a promotional video.

Trailers

OFFICIAL Tower Defense Simulator Trailer

Boss2 in the game trailer.

OFFICIAL Tower Defense Simulator Trailer 2

Boss2 in the game trailer.

Tower Defense Simulator Trailer

Slow Boss in the game trailer.

Tower Defense Simulator Frost Invasion Trailer

Slow Boss in the game trailer.

Jordan Stayt Skin Teaser - Tower Defense Simulator

Slow Boss in the game trailer.

Cyber Military Base Skin Trailer - Tower Defense Simulator

Slow Boss in the game trailer.

Summer Battlepass - Tower Defense Simulator

Slow Boss in the game trailer.

Medic & Turret Update Trailer - Tower Defense Simulator

Slow Boss in the game trailer.

Renders

Slow Boss on a render.

Slow Boss on a render.

Miscellaneous

Slow Boss on the Shotgunner's second Level 5 upgrade icon.

Slow Boss on the Accelerator's current Level 5 upgrade icon.

Slow Boss on the Index icon.

Legacy Slow Boss on the Index icon.

Trivia

• The original name and appearance were based on the Boss2 from Tower Battles.
• When the Uber Mystery was in the game, it had a chance of spawning the Slow Boss upon its death in Golden and Fallen modes.
• In Hardcore Testing BETA, the Slow Boss had 10 defense.
  • This would be later re-added for the modern version with 25% defense. Although the legacy version has none.
• The death sound Slow Boss makes is a deeper sound than Boss2's from Tower Battles.
• The Slow King and the Mega Slow can be considered 2 Hardcore variants of the Slow Boss.
• Due to a bug, the Slow Bosses spawning on wave 29 of Easy mode were separated by an extremely long amount of time. Because of this, even without skipping the wave, the enemies would not have enough time to spawn, causing them to spawn on Wave 30 instead.
  • Since these enemies would not count as enemies that spawned on Wave 30, you could have them spawn after triumphing by killing just the enemies that spawned on wave 30. You could reach zero base health after triumphing this way, but this would not make you lose.
  • This was later fixed on 12th of March 2022, where the time between each spawn is now quicker, with each spawn being 2 seconds instead of 8 seconds.

Update History

• 14 June 2019 - BETA v1.0.0
  • Boss2 added.
• 10 July 2019 - BETA v1.4.0
  • Health decreased from 1,600 to 1,200.
• 15 July 2019 - BETA v1.5.1
  • Renamed from Boss2 to Slow Boss.
  • Appearance changed.
• 13 October 2019 - Release v1.0.0
  • Health increased from 1,200 to 1,800.
  • First wave appearance changed from wave 17 to wave 22 in Easy and Normal modes (now Normal and Molten modes).
  • Basic Freeze Immunity removed.
• 14 February 2020
  • Now has Partial Electric Immunity.
• 26 May 2020 - Release v1.11.0
  • First wave appearance changed from wave 22 to wave 16 in Beginners mode (now Normal mode).
• 29 October 2020 - Overhaul 1.0.0
  • Health decreased from 1,800 to 1,600.
  • Partial Electric Immunity removed.
  • Animation changed.
• 8 May 2021 - Overhaul v1.3.0
  • Appearance changed.
  • Death sound changed.
• 31 October 2022 - v1.4.2
  • Now has a new appearance with the Enemies Beta modifier active.
• 24 February 2024 - v1.14.0
  • Modern variant added.
  • Speed slightly increased in Easy mode (1.5 to 1.6).
  • Now uses Enemies Beta appearance with a different animation in Easy mode.
  • Now gives $300 every 400 health in Easy mode.
  • Now has 25% defense in Easy mode.
  • Now is a boss enemy upon first spawn in Easy mode.
• 3 May 2024 - v1.20.0
  • Slow Boss can no longer be confused by the Jester while it is a boss enemy.
• 10 May 2024 - v1.21.0
  • Slow Boss is now immune to the fallout damage from the Nuke while it is a boss enemy.
• 18 May 2024 - v1.22.0
  • Slow Boss is now immune to knockback while it is a boss enemy.
  • Now appears in PVP Test.
    • Unlocked on Wave 22.
    • Can be sent out for $600 in groups of one.
    • Adds $28 to economy.
• 23 May 2024 - v1.23.0
  • Health increased from 1,600 to 2,000 in Molten mode.
  • Speed slightly increased in Molten mode (1.5 to 1.6).
  • Now has 25% defense in Molten mode.
  • Appearance and animation changed in Molten mode.
  • Now appears in Classic Candy Cane Lane, Classic Forest Camp and Classic Castle.
    • Has 800 health in Classic Candy Cane Lane, 1,800 in Classic Forest Camp and 2,000 in Classic Castle.
• 27 May 2024 - v1.23.2
  • Health decreased from 2,000 to 1,600 in Molten mode.
• 28 May 2024 - v1.23.3
  • No longer appears in Classic Candy Cane Lane, Classic Forest Camp and Classic Castle, as they have been removed.
• 29 May 2024 - v1.23.4
  • Economy boost increased from $28 to $44.
  • Cooldown increased from 1 to 2.
  • First spawn is no longer a boss in PVP Test.
• 21 June 2024 - v1.25.0
  • Send cost increased from $600 to $660.
  • Send cooldown increased from 2 to 3.
• 19 July 2024 - v1.26.0
  • Send cooldown removed.
• 28 August 2024 - v1.29.0
  • Bug: Can be slowed down by the DJ Booth while a boss.
• 31 August 2024 - v1.29.7
  • Bugfix: No longer can be slowed down by the DJ Booth while a boss.
• 25 September 2024 - v1.33.0
  • Health increased from 1,600 to 1,750 in Easy mode.
  • Speed increased from 1.6 to 1.9.
  • Appearance and animation changed.
  • Bug: Defense can no longer be dropped by electric and poison defense dropping towers.
• 6 November 2024 - v1.40.0
  • Slow Boss can no longer have its defense dropped while a Boss enemy.
  • Bugfix: Poison and electric defense dropping towers now can drop its defense, though the Jester still cannot drop it.
• 11 December 2024 - v1.45.0
  • Now appears in Casual mode.
    • Has 1,800 health in Casual mode.
  • No longer appears in Molten mode, as it has been replaced by the Molten Golem.
• 17 December 2024 - v1.46.4
  • Slow Boss now appears in Legacy Molten mode, if activated through Sandbox mode.
• 17 December 2024 - v1.46.5
  • Slow Boss no longer appears in Legacy Molten mode, as it has been removed.
• 12 February 2025 - v1.53.0
  • Legacy version now uses the correct statistics in Sandbox mode.
• 12 February 2025 - v1.53.3a
  • Slow Boss now appears in Legacy Molten mode, if activated through Sandbox mode.
• 9 April 2025 - v1.60.0
  • Now appears in Low Rank PVP Test.
    • Has a spawn timer of 3.
    • Number sent increased from 1 to 1-2.
    • Economy bonus decreased from $66 to $-50.
    • Now changes the health of the Slow Boss to 2,500 when sent.
  • Bug: Uses its base health for natural wave structure spawns when sent instead of the designated send health.
• 23 April 2025 - v1.62.0
  • No longer appears in the PVP Test as it has been removed.
• 30 April 2025 - v1.63.0
  • Bug: Legacy Slow Boss no longer uses the death sound effect.
• 23 July 2025 - v1.71.0
  • Now appears in Basic Arena PVP, carrying over most of its PVP Test statistics.
    • Number sent decreased from 1-2 to 1.
• 6 August 2025 - v1.72.0
  • Wave unlocked increased from Wave 22 to Wave 23.
  • Spawn timer decreased from 3 to 2.
  • Send cost increased from $660 to $750.
  • Economy bonus increased from $-50 to $-10.
  • Health increased from 2,500 to 2,800 when sent.
• 12 September 2025 - v1.74.3a
  • Now appears in Sk8 P4rk Noob difficulty as part of The Takeover Event.
    • Has 2,500 health in Sk8 P4rk.
• 22 September 2025 - v1.74.3g
  • No longer appears in Sk8 P4rk, as it has been removed.

Notes

Easy
Previous Debut	Current Debut	Next Debut
Necromancer & Armored Wave 13	Slow Boss Wave 16	Hidden Boss Wave 17

Casual
Previous Debut	Current Debut	Next Debut
Necromancer Wave 15	Slow Boss Wave 16	Hidden Boss & Hazmat Wave 17

Legacy Molten
Previous Debut	Current Debut	Next Debut
Molten Wave 20	Slow Boss Wave 22	Hidden Boss Wave 24

Basic Arena PVP
Previous Debut	Current Debut	Next Debut
Armored Wave 14	Slow Boss Wave 16	Hidden Boss Wave 17

The Heights (SFOTH Event) (24 June 2019 – 13 October 2019)
Previous Debut	Current Debut	Next Debut
Brute Wave 10	Slow Boss, Fallen Hero & Swordmaster Wave 12	End N/A

Classic Candy Cane Lane (The Classic Event, Mission 1) (23 May 2024 – 28 May 2024)
Previous Debut	Current Debut	Next Debut
Necromancer Wave 7	Slow Boss Wave 8	Breaker4 Wave 9

Classic Forest Camp (The Classic Event, Mission 3) (23 May 2024 – 28 May 2024)
Previous Debut	Current Debut	Next Debut
Breaker4 Wave 8	Slow Boss Wave 9	Grave Digger Wave 12

Classic Castle (The Classic Event, Mission 5) (23 May 2024 – 28 May 2024)
Previous Debut	Current Debut	Next Debut
Korblox General Wave 8	Redcliff Traitor, Breaker4 & Slow Boss Wave 10	Korblox Deathwalker Wave 12

Noob (The Takeover)
Previous Debut	Current Debut	Next Debut
Speedy Boss Wave 8	Slow Boss Wave 9	Brute Wave 10

Pre-MEGA (Easy, Normal, Hard & Insane)
Previous Debut	Current Debut	Next Debut
Necromancer Wave 14	Slow Boss Wave 17	Molten Wave 20