Challenges

BTD4

BTD5

BMC

For the BTD6 challenges, see Challenge Editor.

Challenges are game modes in Bloons TD 4. Each challenge involves completing a track with added stipulations, such as having a limited selection of towers or having only one life.

In the Flash version, there are only four challenges. In the Mobile version, there are many more challenges, with a greater variety of stipulations.

Challenges do not exist in Bloons TD 4 Expansion.

List of challenges

Flash version

Ocean Road

• Difficulty: Medium
• Objective: Beat this track on Medium using only Dart Monkeys and Super Monkeys.
• Solution: You can upgrade them to Spike-O-Pults and Sun Gods, respectively. It is quite difficult to destroy the Lead Bloons, unless you have the Exploding Darts Premium Upgrade or the Double Cash Mode enabled, as Plasma Vision is needed. Otherwise, you will have to rely on timing Pineapples at the right time.

Ant Hill

• Difficulty: Hard
• Objective: Beat this track with only one life.
• Solution: TBA

Lollipop

• Difficulty: Easy
• Objective: Beat this track with only Dartling Guns and Spike Factories.
• Solution: Start with a Spike Factory at the end, save up for a Dartling Gun into the third tier, then start saving up for Spike Storm. Use Glue and Pineapples along the way when necessary.

Pool Table

• Difficulty: Medium
• Objective: Defeat a single wave of 50 MOABS with $50,000.
• Solution: There are a variety of solutions, but the simplest is spamming Operation: Dart Storms across the map.

Mobile version

Ocean Road

Difficulty: Easy

Objective: Same as above.

World Tour

Difficulty: Medium

Objective: Beat this track without using Glue Gunners or Ice Towers.

Military Base

Difficulty: Medium

Objective: Beat this track with Dart Monkeys and Tack Shooters disabled.

River Bed

Difficulty: Medium

Objective: Beat this track using any tower, but at most three of each kind.

Bus Route

Difficulty: Medium

Objective: Same as Ant Hill on the computer; if even a red bloon escapes, it's game over.

Cactus Creek

Difficulty: Hard

Objective: Beat this track using only Boomerang Throwers, Glue Gunners, and Mortar Towers.

Snow Trail

Difficulty: Hard

Objective: Beat this track using only the Monkey Apprentice, Ice Towers, and Bomb Towers.

Go Bananas

Difficulty: Medium

Objective: Deflation-mode challenge, where you start at round 40 and have to make it to round 85.

Blue Laser

Difficulty: Hard

Objective: No Super Monkeys or Banana Farms

Daisy Chain

Difficulty: Hard

Objective: Only Dartling Gunners and Pineapples

Pool Table

Difficulty: Medium

Objective: Same as Desktop version above except popping Bloons gives no cash

Storm Cloud

Difficulty: Hard

Objective: All Towers but no Level 4 Upgrades

Lava Lake

Difficulty: Apopalypse to round 45

Objective: Limited towers: Bomb Tower, Monkey Ace, Banana farm, Boomerang Thrower. $1000 Cash.

Ocean Road

Difficulty: Hard

Objective: Somewhat similar to Full House in BTD5, only 6 towers allowed at a time

Sweet Tooth

Difficulty: Easy

Objective: Similar to There Can Be Only One in BTD5, only 1 tower of each.

Firecracker

Difficulty: Hard

Objective: Same as above.

Extreme challenges (Mobile version only)

Triple 1

Difficulty: Go Bananas Medium to round 50

Unlocked at rank 20. Objective: 1 of each tower, 1 life, and only 1 upgrade allowed.

Pirate Curse

Difficulty: Jolly Roger Medium to round 50

Unlocked at rank 30. Objective: All towers allowed but only 2 upgrades allowed.

Financial Crisis

Difficulty: World Tour Hard to round 60

Unlcoked at rank 50. Objective: No Banana Farms and cash earned is halved.

Supply Lines

Difficulty: Rail Track Hard to round 60

Unlocked at rank 40. Objective: 2000 cash to start, but no cash from popping bloons or at the end of a round.

Attrition

Difficulty: Bloonraker Hard to round 60

Unlocked at Rank 70. Objective: No selling towers and every 10 rounds, your towers downgrade one level. If a tower has no upgrades, it is destroyed.

Self-Destruct

Difficulty: Monkeys vs Bloons Hard

Unlocked at Rank 80. Objective: Can't sell towers and every 5 rounds your most expensive tower self-destructs. Farms are disabled.

Strategies

Main article: Challenges/Strategies

Gallery

Flash version

Challenges menu prior to the addition of the Lollipop and Pool Table challenges

Trivia

• While the challenges menu in the Flash version states that more challenges are coming soon, no challenges have been introduced since 2011.
• Road items (Road Spikes, Monkey Glue, and Pineapples) are available on any challenge, including those that have limited towers.
• These are similar to the Daily Challenges and Special Missions in BTD5.
• In the Lollipop challenge, it is still possible to place Dart Monkeys using its hotkey (D).
• In the Self Destruct challenge, if there are no towers on the map on rounds when one would normally be destroyed, the game crashes.
• The BTD4 Flash Ant Hill challenge appears to be a precursor to Impoppable Mode in BTD5 Mobile.