Uploaded: August 5, 2026
Last Updated: August 6, 2026
Tower Defense is a solo Blooket game mode where players answer trivia questions to earn tokens, then place and upgrade blook towers to defend a track from enemy waves. Tower Defense 2 expands that system to 18 towers, 5 maps, and a 5-tier upgrade path, replacing the single support tower with three specialized units and adding Ghost Blooks as a new enemy type. Tower of Doom, a retired card-based mode, shares no mechanics with either version.
Tower Defense in Blooket is a solo game mode where players answer trivia questions to earn tokens, then spend those tokens placing and upgrading blook towers along a track. The towers fire at waves of enemy blooks, and each round adds tougher enemies as the defense line holds or breaks.
Blooket released Tower Defense on February 9, 2021. Players access it through Solo, Homework, or Hosting mode, and three maps are available: Sunny Meadow, Lost Desert, and Abandoned Mine.
Each tower comes from a specific blook line, such as Dragon, Unicorn, or Owl. Every tower carries three upgrade tiers, and the final tier changes its appearance and adds a special ability.
Enemy blooks scale in health and speed as rounds climb, following a set progression from Light Blue through Slime Monster tiers. That scaling is exactly what Blooket’s sequel, Tower Defense 2, was built to push further.
Tower Defense 2 is Blooket’s sequel to Tower Defense, released February 12, 2023 as a Plus-only beta before going free for everyone on March 6, 2023. It expands the original’s system to 18 towers, 5 maps, and a 5-tier upgrade path, adding difficulty tiers and a new ghost-detection mechanic.
The sequel reworks the map system, too. Sunny Meadow, Lost Desert, and Abandoned Mine return in remade form, and two new maps join them: Crossroads and Fractured Factory, both built around dual paths that can shift mid-game.
Nine new towers join the roster, including Gorilla, Peacock, Wizard, and Alien. The King, Queen, and Toucan take over as three separate support towers, replacing the single Jester from the original game.
Four difficulty levels structure the mode: Easy, Normal, Hard, and Nightmare. That difficulty range, along with the added tower count and upgrade depth, marks the clearest split between the two versions of Tower Defense.
Tower Defense 2 differs from Tower Defense in upgrade depth, map design, and support towers. The sequel uses 5 upgrade tiers instead of 3, introduces dual-path maps, and replaces the single Jester with three specialized support units: King, Queen, and Toucan.
| Feature | Tower Defense (TD1) | Tower Defense 2 (TD2) |
| Release date | February 9, 2021 | February 12, 2023 |
| Towers | 12 | 18 |
| Upgrade tiers | 3 | 5 |
| Maps | 3 | 5 |
| Support towers | 1 (Jester) | 3 (King, Queen, Toucan) |
| Difficulty levels | None | 4 (Easy, Normal, Hard, Nightmare) |
| Ghost Blooks | No | Yes, from round 12 on Normal |
| Damage system | Percentile damage caps | Flat per-level stat scaling |
Tower Defense 2 also raises the stakes economically. Wave rewards increase compared to the original, but tower costs climb even faster, so precise placement across multiple lanes matters more than raw tower count.
Several Tower Defense towers are the same blooks featured in Blooket’s pack system. The King appears as a support tower in both Tower Defense games and as the Medieval Pack’s Legendary blook, while Phantom King shows up as Tower Defense’s own Mystical blook.
Santa Claus follows the same pattern. The Blizzard Pack’s Legendary blook also appears as a boss inside Tower of Doom, tying Blooket’s retired card mode into the same blook roster used across packs and defense games.
These crossovers mean a blook’s role changes by game mode without changing its identity. A player checking the King’s Legendary odds in the Medieval Pack is looking at the identical blook that anchors a Tower Defense support lineup, and a player curious about Mystical blook obtainment is looking at the same rarity tier Phantom King belongs to.
Tower Defense suits players who want a faster, simpler defense loop with fewer towers and a shorter learning curve. Tower Defense 2 suits players who want deeper upgrade paths, multi-lane map strategy, and a harder difficulty ceiling through its Nightmare mode.
Newer players tend to progress faster in the original Tower Defense, since its 3-tier upgrade system and single support tower keep decisions simple. The percentile damage cap system also makes early tower choices more forgiving.
Players chasing a bigger challenge, or who already know Tower Defense’s Perma-Stun mechanics, get more out of Tower Defense 2’s ghost detection requirements and dual-path maps. Either version pulls from the same core loop of answering questions, earning tokens, and defending a track.
A full breakdown of Tower Defense’s strongest blooks and round-by-round strategy covers the original version in depth, and a separate guide walks through Tower Defense 2’s best towers and difficulty tiers.
Tower of Doom shares no mechanics with Tower Defense. Tower of Doom was a card-based, turn-based combat mode retired from Blooket on August 9, 2025, while Tower Defense and Tower Defense 2 remain live tower-placement games players can start today.
Tower of Doom asked players to build a deck of cards rated by Strength, Charisma, and Wisdom, then battle enemies through turn-based comparisons instead of placing towers on a track. Blooket retired the mode after a five-year run, and a fan-made, unaffiliated remake called Tower of Doom: Reborn now carries the concept forward on itch.io.
Players searching for Tower of Doom strategy or its removal date can find the full history in a dedicated Tower of Doom guide.
Blooket made Tower Defense free for everyone during Season 2, shortly after its Plus-only launch. Tower Defense 2 followed the same pattern, launching as a Plus exclusive before going free on March 6, 2023.
Tower Defense 2 runs harder overall, mainly through its Nightmare difficulty, higher tower costs, and Ghost Blook enemies that require dedicated detection. Tower Defense’s simpler 3-tier upgrade system makes it the easier entry point.
No current Plus requirement applies. Tower Defense 2 launched as a Plus-only beta in February 2023 but became free for all players on March 6, 2023.
Blooket confirmed no return date for Tower of Doom since its removal on August 9, 2025. A fan-made remake called Tower of Doom: Reborn runs separately on itch.io for players who want a similar experience.
No official round cap exists in either Tower Defense version, since enemy scaling and device performance set the practical limit rather than a fixed ceiling. Players report reaching round 1000 or more in the original Tower Defense, and Tower Defense 2’s Fractured Factory leaderboard lists round 77 as its verified top result.