Siege Engine was previously removed on the 15th of January 2025, though it has been made available through the Sandbox mode later.
It is not accessible anywhere else in the game. This page will attempt to include information about both the version before removal and its re-added version.

- "A siege engine?! This janitor must have been feeding them our classified information! Not good , they're more prepared than we thought!
Hold the line! We can't afford to have them get near the research outpost." - ―Dispatcher on Wave 4 (Outpost 32)
Description
The Siege Engine, internally referred to as Frost Spawner, was an enemy that only appears in Outpost 32 as part of the Operation I.C.E Event. Unlike other enemies in the event and even the game in general, it does not head to the exit and instead acts as the entrance for enemies to spawn from. It is still an enemy despite this, having its own statistics, an Index entry and even being affected by modifiers which apply hats to enemies like the Fireworks modifier.
It will kill units that collide with it and trigger road obstacles. As it drives on the path, it will run over all enemies in its path, killing them. It uses its own path instead of the regular one, though the main difference here is that its path takes a few shortcuts. This enemy is not required to be killed for waves to progress. While it has multiple attributes, they are all applied so that it is immune to as many sources of damage as possible and to prevent towers from attacking it. Its No Target and God attributes can be removed with the Pumpkin Bomb, which will also boost its health from 0 to 50,000 (100,000 if the Pumpkin Bomb also applied Bloated), making it possible to be killed.
Logbook Description
The Frost Spawner used in Outpost 32 to take down the Outpost's defenses. How did you get this anyways?!?
Appearance
The Siege Engine is a light blue siege engine, mostly empty except for a blue portal. When it moves on the path, the portal will be closed via an overhead hatch, and a trail of wind will appear near it.
Event Strategy
As this enemy only appears through Sandbox mode, no strategy section is made for its current version. Instead, a strategy section for the one that appeared without Sandbox mode in Outpost 32 is listed instead.
- You do not need to, and cannot, kill the Siege Engine in most regular occurrences.
- If you need to kill the Siege Engine for the Logbook do note that it is extremely cumbersome and time-consuming.
- You require the use of the Pumpkin Bomb removing the No Target and the God attributes. Therefore, it can only be killed on Outpost 32 Easy difficulty, as the Hard difficulty does not permit the use of consumables.
- The odds of this occurring is extremely low, so you will likely require multiple Pumpkin Bomb for these attributes to be removed.
- Once God and No Target attributes are removed, you can set any towers to target last which will enable you to kill the Siege Engine, with the exception of the Accelerator, which is unable to target the Siege Engine, even with No Target removed.
- The Gatling Gun can bypass the No Target attribute with its FPS ability, however you still need to get rid of the God attribute.
- You require the use of the Pumpkin Bomb removing the No Target and the God attributes. Therefore, it can only be killed on Outpost 32 Easy difficulty, as the Hard difficulty does not permit the use of consumables.
Gallery
Miscellaneous
Trivia
- This is the second enemy with the God attribute.
- If the player spawn a Siege Engine in Sandbox Mode, it will head towards the exit without stopping.
Update History
- 16 December 2024 - v1.46.0
- Siege Engine added.
- Bug: Siege Engines can sometimes be positioned at the wrong angle.
- Bug: Siege Engine can sometimes stay closed after it stops moving, though this is purely visual.
- 8 January 2025 - v1.48.0
- Now has a description in the Index.
- 15 January 2025 - v1.49.0
- Siege Engine removed from the main game, now appears exclusively in Sandbox mode.
Notes
- ↑ Dependent on how quickly barriers are broken.
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Sandbox Only Enemies | ||
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Legacy Molten Mode | Normal • Speedy • Slow • Normal Boss • Hidden • Mystery • Necromancer • Molten • Slow Boss • Hidden Boss • Shock • Speedy Boss • Mystery Boss • Mystery Summoner • Molten Titan • Molten Boss | |
Golden Mode | Abnormal • Quick • Heavy • Abnormal Boss • Shadow • Mystery • Dark Necromancer • Golden • Chained Boss • Shadow Boss • Charge • Tank • Mystery Boss • Boomer • Summoner Boss • 24 Karat • Gold Guard • Gold Titan | |
Legacy Fallen Mode | Abnormal • Quick • Heavy • Abnormal Boss • Shadow • Mystery • Dark Necromancer • Fallen • Giant Boss • Shadow Boss • Glitch • Hazard • Tank • Mystery Boss • Boomer • Templar • Summoner Boss • Error • Fallen Hero • Fallen Guardian • Fallen King | |
Brain Rot | Toilet • Streamer • Chad • Metal Toilet • Ninja Toilet • Png Bot2 • Png Bot • Brick Man • Megatron Toilet • Pro Streamer • Arrow • Png Bot4 • Png Bot3 • Toilet Boss | |
Other | Slime |
Legacy Enemies | ||
---|---|---|
Replaced | Blighted • Boomer 1 • Necromancer 2 • Mystery 2 • Gravekeeper • Super Mystery • Ultra Mystery • Uber Mystery • Ninja • Frost Hero • Strong | |
Pre-MEGA | Carrier • Swarm • Tank 2 • Boomer 2 • Controlled • Shrike Crystal • Rusted • Witch Doctor • Tombstone • Frozen • Deep Freeze • Frost Hero | |
Polluted Wasteland | Radioactive • Wasted Boss • Amalgamation • Rusher • Splitter • Split • Nuclear Fallen King | |
Hidden Wave (Legacy) | Glitched Giant • Bug • Bruh • SCT • Jaxe • Mechanical Rot • Frost Hero • Developer 1 • Developer 2 • Developer 3 • Creator • A • B • C | |
Other | Void • First Form • Imposter |