FANDOM




Slows Bloons down even after they thaw out!
~ BTD 4 description
Makes the bloons so cold that they move slowly even after thawing out.
~ BTD 5 description

Permafrost is an upgrade of the Ice Tower in BTD3, BTD4. BTD5 and BTD6.

It allows Bloons to stay slow once they have been unfrozen (50% speed for one layer, or two with the Deep Freeze upgrade purchased). It is also one of the cheapest upgrades in BTD5, next to Sonic Boom, and Long Range Darts.

In BTD6, this upgrade returns as the first upgrade of Path 1. Again, its slows bloons by 50% once unfrozen, but only lasts for one layer (2 with Deep Freeze, 4 with Absolute Zero). When crosspathed with any Tier 5 upgrade, including upgrading to Super Brittle, the Permafrost applies to blimps upon damaging, but with only 25% slowdown instead of 50%.

Bloons Tower Defense 3Edit

In Bloons TD 3, Permafrost is the 2nd upgrade for the Ice Tower, it costs $215 on Easy, $255 on Medium and $270 on hard.

Bloons Tower Defense 4Edit

In Bloons TD 4, Permafrost is the 2nd upgrade for the Ice Tower, it costs $85 on Easy, $100 on Medium and $110 on hard.

Bloons Tower Defense 5Edit

In Bloons TD 5, Permafrost is the 1st upgrade for the second path, it costs $85 on Easy, $100 on Medium, $110 on Hard and $120 on Impoppable. If combined with Sabotage Supply Lines and glue it will make a red bloon or lead bloon as slow as a ZOMG.

Bloons Tower Defense 6Edit

In Bloons TD 6, Permafrost is the 1st upgrade for the first path, it costs $85 on Easy, $100 on Medium, $110 on Hard and $120 on Impoppable.

StrategyEdit

  • Permafrost is a cheap upgrade to get to slightly boost your Ice Tower's capabilities, usually featured in extremely optimised strategies.

Version History (BTD6)Edit

17.0

Buff Tier 5 upgrades now apply Permafrost effect to MOAB-class bloons.

TriviaEdit

GalleryEdit

Community content is available under CC-BY-SA unless otherwise noted.