DoomsDay Campaign

The Corruptor Campaign is an optional mod for BTD5, which features old and new towers, mechanics, tracks, and a storyline driven around the Corrupter.

Towers
In the campaign you'll be introduced to the classic BTD5 towers from the Dart Monkey to the Sub. Some Old towers, however, will not behave the same or have the same upgrades after Chapter 1.

New Towers will also make a debut, such as the Hover Monkey, Ice Chucker, and a few more.

Though old towers retain the same upgrades, the paths have been modified with another "3rd/4th tier" that'll be available after obtaining 2nd tier upgrades.

Towers will also have to option to move from there starting placement, with the right upgrades of course. Explained in Mechanics.

Tracks
Most tracks will behave the same, with the occasionally splitting paths, and 2+ entrances/exits. Some tracks may be experienced more than once in other levels with only slight variations, depending on starting difficulty.

Some tracks have new mechanics inserted as well. Explained in Mechanics.

Bloons
Bloons are the primary enemy in the game. Classic BTD5 bloons, as well as the DDT, make an appearance in the game as well as new bloons with new properties and non-bloon enemies. Some enemies/bloons in the game have abilities that could stun, slow down, push/pull, or potentially destroy towers in the game.

Mechanics
Gameplay mechanics won't always be the same with defending bloons from reaching the end. There will be a goal to achieve which, of course, requires you to keep the bloons from reaching a destination. And said destination may not always be in one spot during a game.

Apart from keeping bloons from reaching a certain location. There are also timed games which may require you to purchase a certain amount of towers, keeping some/a tower(s) alive, surviving "endless" waves, or even preventing a certain bloon from "going off."

Bloons aren't the only thing that have been modified. Towers as well have the option to now move from spot to spot. Not instant. Most move very slowly and can not attack during movement though some could acquire upgrades to help with that. This is important as some levels will require the player to prevent certain towers from being destroyed.

Chapter 0
Main article: Corrupter Campaign/Chapters/Chapter 0

Tutorials levels for those not familiar of the basic mechanics of BTD5. Consists for 4 short levels. Starting difficulty does not matter.

Chapter 1
Main article: Corrupter Campaign/Chapters/Chapter 1

Beginning of the story line. All classic towers available up to 3rd tier. No new towers.

Easy-Hard Mode: 6 Levels

Impoppable: 7 Levels.

Chapter 2
Main article: Corrupter Campaign/Chapters/Chapter 2

Use of classic towers disabled. Only a few available. Introduction of new upgrades. Two new towers introduced. Two New Bloons. No New M.O.A.B. class bloon.

Easy-Medium: 6 Levels

Hard: 7 Levels

Impoppable: 5 Levels

End of Easy Difficulty

Chapter 3
Main article: Corrupter Campaign/Chapters/Chapter 3

More classic towers unlocked. One new tower. Two new Bloons. One new M.O.A.B. class bloon.

Medium/Hard: 8 Levels

Impoppable: 6 Levels