This article pertains to known bugs in Bloons TD 4 and Bloons TD 4 Expansion only.
BTD4 only[]
Hey, that dart monkey is not supposed to be here!
BTD4 Challenge Restrictions bug[]
- In the Sweet Tooth challenge (pass in Easy mode using only Dartling Gunners and Spike Factories), the player can use a Dart Monkey by pressing its hotkey (D). The dart monkey still functions normally and the player can still earn the Lickity Split achievement as normal.
Beacon Bug[]
- In BTD4, some towers covered by the Monkey Beacon's range will not get affected by its additional effects.
(Note: In earlier rounds where there aren't many towers, a tower that is newly placed will immediately get the effect of monkey Beacon's range. However as the number of towers increase, there is a chance that the newly placed towers will get the effect of monkey Beacon's range after a new round has been started.
Corrosive glue is not corrosive bug[]
- Sometimes in BTD4, the glue gunner's corrosive glue will not pop bloons on fast forward.
Spike Storm glitch[]
- The Spike Factory's final upgrade, Spike Storm will sometimes only cover up half or only a quarter of the screen in BTD4.
Huh?
Road Spikes Not On Track[]
- On BTD4, if the player hovers Road Spikes half on the blue space with the player's rank, XP, round, and the Pre-Round Comment, the player's NK account, or the final side of the track, the player can place the Road Spikes there, even though they can normally only be placed on the track.
Rank 99 bug[]
Easiest game ever!
- In BTD4, when the player levels up, it says that the player has rank 99, but on the other rank thing at the bottom, it says rank 2. Players (sometimes) can get very excited over this, but it's actually a bug.
- This can happen for any other rank as well.
Medal Glitch[]
- If the player completes, lets say Ocean Road easy, and they complete a challenge, that Ocean Road easy medal will disappear, but a new medal will show up under what they just did (MOAB madness: Kiwi medium, Lollipop challenge: Lollipops easy, etc.)
Upgrade Glitch[]
- Upgrade anything to level 3 or higher, then as it's upgrading, buy another tower. That tower will show the same upgrade for the other tower. You just skipped a couple of upgrades! However, lets say you skipped all the upgrades but the sun god, your super monkey will have a small range and lack Lead popping power.
- And, if you want an upgrade but you aren't in rank put a tower and spam upgrades if you did it well you can have a tier 4 upgrade in rank 2.
Place Towers Anywhere[]
- This glitch allows you to place towers anywhere on the map. First, press the hotkey of the desired tower you want to place. Then, press the hotkey of one of the road items where you ARE allowed to place it. Quickly click, and press the hotkey of the desired tower you want to place. This can take a few attempts before successfully doing the glitch.
- This does NOT work with dartling guns or spike factories, as there is no hotkey for either tower.
- You can also do the place towers anywhere glitch from the #BTD3 section.
Spike Factory Cramming Bug[]
- When spamming multiple spike factories together in a narrow spot near the edge of the screen (e.g. rightmost space in the Fireworks track), some of them will deploy spikes off the track and make some players lose.
Iced Bug 3[]
- On laggy computers, bloons can completely freeze and stop near the front. They will become impoppable and no more bloons will spawn. Exiting the track will not erase them, and so does switching tracks. The player will have to restart the game to get rid of them.
Pierce Increase with Fast Forward Bug[]
- This has been tested with Super Monkey/Sun God and Dartling Gun/Laser Cannon in Sandbox. Sun God has a pierce of 2 on B.F.B on normal speed while a pierce of 5 when using fast forward. Laser Cannon has a pierce of 4 on B.F.B. on normal speed and a pierce of more than 10 when using fast forward. I can also confirm this at rounds 90-100 with fast forward on B.F.B and M.O.A.B. cant pass my sungod barrier while putting the game on normal speed, lots of M.O.A.B's pass the barrier and it almost ends up with a game over.
Track Leaderboard glitch[]
- Sometimes when clicking on the track leaderboard option it will darken your screen as if the leaderboard was showing but there will be no leaderboard leaving you unable to return you to the game.
Skip Other Upgrades Bug[]
- If you have same or different tower and upgrade the tower and click fastly on the other tower you can skip the 1 upgrade.
ok but wait, why there is another upgrade?
"You beat this level on null"[]
- Sometimes when you start a game it will not start and just say "You beat this level on null" and then put you on the main menu
BTD4 and BTD4 Expansion[]
Round 0 Bug[]
- Sometimes before you start a game a comment will appear saying "Round 0 passed. 99 money awarded", but you won't get the extra cash.
Disappearing Boomerang Bug[]
- Boomerang Throwers' boomerang/glaive/lightsaber will always disappear before it can even come back to the tower if fast forward is on, even if it hasn't reached its pierce cap. This has never been fixed due to Ninja Kiwi no longer updating this game.
Leveling Delay Bug[]
- Whenever a tower is upgraded, its "level" (shown above the selected tower's name) stays the same until the player either clicks it again or deselects it and selects again.
What is a dartling monkey doing in the middle of the road?!
Dartling Gun Bug[]
- Bug 1: Sometimes in fast forward, the Dartling Gun shoots 2 streams of darts. It is more common when it is upgraded to Increased Barrel Spin.
- Bug 2: (Does not work with Laser Cannon) When Fast Forward is active, sometimes the Dartling Gun's shots reach bloons; the darts will not pop the bloons.
Double missile glitch (This should be an upgrade!)
Double Missile Bug[]
- In BTD4 or BTD4E, if the game is in fast forward, briefly a second missile can be seen launched from the Missile Launcher.
Iced Bug 2[]
- This bug is very rare. When a bloon is frozen by an Ice Tower, the bloon will stop forever, and it cannot be thawed or affected by the towers or road items, and the player needs to exit the game.
Skip Round Lag Bug[]
- Sometimes, when the player starts a round in BTD4 or BTD4 expansion, the game will freeze, and then the round will be completed. The player will get their reward money, but no bloons will appear on the screen. This is more common on slower computers in BTD4. It happens most often in the first few rounds, but it may also happen in late game levels or the MOAB Madness mission on BTD4.
Ice Tower! Give me back my boomerang!
Melee Bug 2[]
- The boomerangs that the Boomerang Thrower shoot, will not return to the tower; instead, they will vanish at about 2/3 of the way (with Fast Forward on). And even if Fast Forward is off, the boomerangs will not pop any bloons after that, but they will still be present. This does not happen in BTD4 iOS.
Explosion bug[]
- In BTD4 and BTD4 Expansion, if there are a large amount of bloons that the Bomb Tower is attacking, the game will not show the explosion, only the frags (from the Frag Bombs premium upgrade). This can also happen with the Mortar Tower; it only shows the bloons' layer popping. This is caused by lag.
Wizard Monkeys can hover over the void by gravity defying powers!
Black Patch Bug[]
- Around Round 60 (or lower on laggy computers), a black/white patch will appear where a lot of action is going on. There is no known fix to this. Also sometimes, the spikes fired by a spike factory have a black/white square around them. (This may be just an imagination, but this seemed to happen more often when a bloon buster mortar fired at a spot within the spike factory's range.) This happens due to the fact that the computer can't handle all the graphics. Happens earlier on tracks with complicated backgrounds.
- Placing lots of road items on one spot will result in this bug as well.
Monkey Glue Bug[]
- In BTD4, the player can place Monkey Glue off the track. It is often around the borders.
Road Spikes Jump bug[]
- In BTD4 and BTD4 Expansion, there is a glitch where fast bloons can travel a short distance over road spikes before popping, causing the bloons that spawn from them to miss the road spikes completely. This also happens with the road spikes produced from Spike Factories.
Loud SFX Glitch[]
- When you unlock the Super Monkey at Rank 15, you will hear the unlock sound effect, but way louder than usual.
Save Bug[]
If you save your game in BTD4E, you can load your save on BTD4 and it will load a different map and the towers will be where you placed them in BTD4E. This could result in towers on the road, land towers on water and water towers on land.
Buccaneer on Land Bug[]
If the player hovers the Monkey Buccaneer over an empty spot in water while trying to place it, and then right clicks to open up the Adobe Flash Player menu, the player can place the Buccaneer on land if they click on an empty land spot quick enough.
BTD4E only[]
Pineapple Bug[]
- In this game, if you use a pineapple, you can see a second explosion behind the pineapple explosion.
HEY! THAT'S CHEATING!
Banana Farm On Deflation Bug[]
- It is possible to get a Banana Farm on Deflation by pressing its hotkey (F). However, it gives no money.
Not really much of an achievement. What the heck does "null" even mean?
Track 6 Bug[]
- If the player plays track one on BTD4 expansion and save, and then when the player goes to the original BTD4, it will take the player to Firecracker. Also, if the player quits BTD4 and reload the save, the player should click on Resume Game. The player might see a message saying Congratulations! You passed this track on null. The player can also earn an achievement for this.
- If the player clicks "Keep playing in freeplay mode", then the player just starts from whatever round the player was at when the player quits BTD4. The player can even save.
- Beating the track on the difficulty it was on still gives the player the You beat this track on (difficulty) notice, and then it becomes freeplay.
- Sometimes, the player can't click Resume game. When this happens, go to any track, and the player has passed it on null.
Specialties bug[]
- In BTD4 Expansion, if the player uses the Vehicles specialty, it reduces the cost of Monkey Buccaneers and Monkey Aces, but it increases the cost of their upgrades.
That's one weird-looking spike factory!
Error by creating new towers bug[]
- In BTD4 Expansion, and in the towers menu, when the player hovers the cursor on the Dartling Gun or Spike Factory, it shows the image of the Dart Monkey instead of the image of the Dartling Gun/Spike Factory.
Locked Bloons Bug[]
- In BTD4 Expansion, the player sometimes cannot play in the Subterranean Sewers track. If the player clicks Start Round, the round will only send up to 5 bloons (the other bloons will be locked at the beginning of the track), and if they reach the exit, the player loses lives, but the player can't start the next round. Then, if the player quits the game and play on another track, the locked bloons will remain on the track, and the player's towers cannot pop them.
Covered Menu bug
Covered Menu bug[]
- The tower description is covered by the bottom of the screen. See the photo for more.
