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Tower Defense is one of the most popular gamemode in Blooket. It was first released on February 9, 2021 for Plus users and became available to all players on February 23, 2021, during Season 2.

In this gamemode, your goal is to defend a track from waves of opponents Blooks by placing towers where towers are also a blooks. First, you need answer questions to earn tokens, then you can use those tokens unlock and upgrade towers. As the rounds progress, enemies grow stronger and appear in larger numbers, which makes your gameplay really challenging.
There are 9 enemy blooks and 29 tower blooks featured in this game mode. Where enemy includes Light Blue, Pink, Purple, Lime, Orange, Green, Red, Black, Slime Monster and tower includes Chick, Owl, Squirrel, Goldfish, Pig, Elf, Dragon, Wizard, Unicorn, Baby Penguin, King, Jester, Chicken, Parrot, Macaw, Cockatoo, Agent Owl, Party Pig, Master Elf, Witch, Penguin, Seal, Polar Bear, Arctic Fox, Arctic Hare, King of Hearts, Phantom King, Mad Hatter. Which means there are total 38 blooks in tower defense mode.
Table of Contents
Gameplay Overview

Tower Defense is a strategy-based gamemode where you need be accurate in answering question and place the towers (i.e blooks) in such way that they can defeat oponents blooks.
After you complete each round, you have to answer three questions. Correct answers gives you a tokens, with a bonus for getting all three correct. And you can used those tokens in buying towers.
The mode also introduces enemy waves that increase in strength as rounds continue. The challenge comes from balancing which towers to buy, when to upgrade, and how to arrange them for maximum coverage.
On August 21, 2025, Tower Defense received a minor redesign. This update added confetti effects when answering questions correctly and made the gamemode resistant to hacks. The sequel, Tower Defense 2, received the same update.
Maps in Tower Defense
Tower Defense currently has three different maps, which have their own obstacles and design.

It is the simplest map with open grassland paths, best suited for beginners.

It is a desert map with 11 obstacles.

It is the most complex map, with 12 obstacles and narrow tracks.
Enemies (Evil Blooks)
Enemies in Tower Defense are called Evil Blooks. Each type has its own health, speed, and drop. As your will cross the round the more power ful blooks will come in your game.
For example:

Light Blue Blook has 1 health and is the weakest enemy.

Pink Blook is little stronger then light blue stronger and drops a Blue Blook when you defeat it.


Orange and Green Blooks become faster and harder to defeat with health values up to 20.


Red and Black Blooks reach higher durability with 40–85 health.

After round 50, Light Slime Monsters are generated based on a formula, which will increase your difficulty.
Towers

Towers are friendly Blooks that you can purchase with tokens. They can be placed on open tiles not blocked by the track or obstacles. Each tower has damage, attack speed and range.
Every tower has three upgrade tiers, with two branching choices at each stage. Early upgrade will give you bronze and silver bases, while the final upgrade gives a golden base and a unique ability. You can also sold towers for 80% of their total cost (rounded to the nearest token).
Tower | Base Stats | Upgrades |
---|---|---|
Laser Chick | Damage: 1 Attack Time: 1.3s Range: 2 Cost: 2 | Wise Chick: Increases range by 1 (Cost 1) Strong Chick: Triples damage (Cost 2) Chicken Army: Splits into 3 chicks, each dealing triple damage (Cost 4) Quick Chick: 1.5× faster attack speed (Cost 2) Speedy Chick: 1.5× faster attack speed (Cost 2) Chicken Bomber: Throws bombs with area splash, 1.5× damage (Cost 4) |
Owl Sniper | Damage: 5 Attack Time: 4s Range: 9 Cost: 3 | Buff Owl: Doubles damage (Cost 2) Power Owl: Doubles damage (Cost 2) Agent Owl: Deals 25% of enemy health, max 150 (Cost 5) Quick Owl: 1.5× faster attack speed (Cost 2) Speedy Owl: 1.5× faster attack speed (Cost 2) Birds: Turns into 3 birds that attack in a line (Cost 4) |
Nutty Squirrel | Damage: 3 Attack Time: 1.5s Range: 1.5 Cost: 3 | Sharp Squirrel: +1 range (Cost 1) Strong Squirrel: Triples damage (Cost 3) Lots’O Squirrels: Turns into 9 squirrels, each throwing ¼ damage acorns (Cost 4) Swift Squirrel: 2× firing rate (Cost 2) Speedster Squirrel: 1.5× firing rate (Cost 2) Go Nuts Squirrel: Attacks super fast every 5 hits (Cost 4) |
Splashy Goldfish | Damage: 2 Attack Time: 2s Range: 1 Cost: 4 | Goldy Goldfish: Doubles damage (Cost 2) Super Goldfish: Doubles damage (Cost 2)4 School of Fish: Sends goldfish from exit that explode (Cost 4) Quick Goldfish: 1.5× faster attack (Cost 2) Soaker Goldfish: Increases range by 1.5 (Cost 2) Hungry Fish: Sends half-damage wave after each attack (Cost 4) |
Pig Bomber | Damage: 5 Attack Time: 3s Range: 1.5 Cost: 4 | Big Pig: Doubles damage (Cost 2) Power Pig: Doubles damage (Cost 2) Party Pig: Forces enemies to dance for 1s (Cost 4) Boomer Big: 1.5× blast area (Cost 2) Perceptive Pig: +1 range (Cost 1) Giant Pig: Splits into 5 balls after exploding (Cost 4) |
Archer Elf | Damage: 4 Attack Time: 2s Range: 2 Cost: 4 | Buff Elf: Doubles damage (Cost 2) Sharpshot Elf: +1 range (Cost 2) Master Elf: Deals 75% damage, shoots 4× faster (Cost 4) Stealth Elf: 1.5× faster attack (Cost 2) Prodigy Elf: 1.5× faster attack (Cost 2) Enchanted Elf: Shoots exploding arrows, 2.5× damage (Cost 4) |
Flame Dragon | Damage: 3 Attack Time: 2.3s Range: 1.4 Cost: 4 | Might Dragon: Doubles damage (Cost 2) Lethal Dragon: Doubles damage (Cost 2) Fire Dragon: +1 range, 1.75× damage (Cost 4) Swift Dragon: 1.25× firing rate (Cost 2) Speed Dragon: 1.25× firing rate (Cost 1) Wind Dragon: Half firing rate, blows back enemies (Cost 4) |
Spark Wizard | Damage: 2 Attack Time: 3s Range: 1.7 Cost: 5 | Advanced Wizard: 2.5× damage (Cost 2) Elder Wizard: Doubles damage (Cost 2) Evil Witch: Casts cursed exploding orb (Cost 4) Quickcast Wizard: 1.5× firing rate (Cost 2) Crazy Wizard: 2× more zap targets (Cost 2) God of Lightning: 2× more zap targets (Cost 4) |
Rocket Unicorn | Damage: 5 Attack Time: 3s Range: 5 Cost: 6 | Swift Unicorn: +2 range (Cost 1) Daring Unicorn: Doubles damage (Cost 3) Crazy Unicorn: Missiles deal 15% enemy health, max 50 (Cost 7) Majestic Unicorn: 1.5× firing rate (Cost 2) Kaboom Unicorn: 1.5× blast area (Cost 2) uni-CORN: Fires exploding corn kernels (Cost 4) |
Freeze Penguin | Damage: 0 Attack Time: 3.7s Range: 1 Cost: 3 | Icicle Penguin: +1 damage (Cost 1) Frosty Penguin: +2 damage (Cost 1) Emperor Penguin: Slows enemies greatly, no freezing (Cost 4) Blizzard Penguin: 1.25× firing rate (Cost 2) Sub-Zero Penguin: 1.5× freeze time (Cost 2) Arctic Buddies: Executes enemy every 5 attacks (Cost 4) |
The King | Damage: 1 Attack Time: 1s Range: 2 Cost: 12 | Noble King: 1.5× firing rate (Cost 7) Mighty King: Doubles damage (Cost 7) King of Hearts: Throws exploding hearts (Cost 7) Wise King: +1 range (Cost 2)Great King: +1 range (Cost 2) Phantom King: Swords deal 2× damage (Cost 7) |
Helpful Jester | Damage Boost: 50%Attack Time: 10s Range: 2 Cost: 4 | Charming Jester: Doubles firing rate of nearby towers (Cost 2) General Jester: Doubles damage of nearby towers (Cost 2) Mad Hatter: Multiplies attack and damage buffs by 1.5 (Cost 4) Friendly Jester: +1 range (Cost 1) Good Guy Jester: +1 range (Cost 1) Mini Jester: Smaller size and half cooldown (Cost 4) |
Best Strategies for Winning
Experienced players use advanced strategies to handle later waves. One popular tactic is the Perma Stun, which relies on Wind Dragons and Mini Jesters. Mini Jesters increase the firing speed of Wind Dragons, keeping enemies frozen in place while other towers like Unicorns and Owls deal damage.
Another approach is the Master Elf + King combo. Players upgrade Elves into Master Elves early on, then save tokens to unlock Kings around wave 15. Jesters are added to boost the Kings’ attack power.
Some recommended upgrade paths are:
- Pig → Blast Radius → Range → Party Pig
- Dragon → Attack Speed → Attack Speed → Wind Dragon
- Jester → Firing Rate → Range → Mini Jester
- Unicorn → Attack Speed → Blast Radius → Crazy Unicorn
- Owl → Speed → Speed → Agent Owl
- Penguin → Damage → Damage → Emperor Penguin
Surprises In Round
As you eliminate evil blooks you are going to see several surprise where some may benefit you but some may not.
1.Tax Time

Tax time surprise will make you loose half of your upgrade your token. So, it is categories in bad suprise.
2.A little Help

A little help tower will get you one random tower in Tower Defense. We can categories this in good surprise.
3.Double Damage

Double damage will make your tower deal double damage for the next 30 seconds.
4.Alien Invasion

Alien Invasion will make you loose one random tower.
Trivia
- Tower Defense, Tower Defense 2, and Café are the only Solo gamemodes without Homework mode.
- The Sniper Owl has the longest attack range of any tower, followed closely by the Rocket Unicorn.
- The Orange Blook is the fastest enemy, while the Black and Light Slime Monsters are the slowest.
- The Black Blook is the smallest enemy but also among the quickest.
- Tower Defense was inspired by Bloons Tower Defense and took over a year to develop.
- The God of Lightning wizard upgrade references Thor from Marvel.
- The Black Slime Monster is believed to be a reference to Venom, due to its slime-like design.
- Tower Defense is one of six gamemodes featuring a Mystical Blook. In this case, it is the Phantom King.
- The King is the most expensive tower, while Chick is the cheapest.
- The current world record holder for Blooket Tower Defense is Azayu, who reached Round 1000 on every single map.
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