- 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[]
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Flash version[]
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.