Best Merge Tower Defense 2021 Apps & Games

233+ iOS apps & games curated and reviewed

4.0 avg rating
20 free apps & games
Updated August 2026

The best merge tower defense 2021 apps and games on iPhone average 4.0★ across 233+ titles — we've ranked them by what real users actually keep on their phones. Updated August 2026.

Compare top Merge Tower Defense 2021 Apps & Games (August 2026)

#AppPriceRatingAdsIn-App PurchasesUpdated
1Merge Tower Defense 2021Merge Tower Defense 2021Free4.3★ (32)YesNoJul 2026
2Merge Clash: Tower DefenseMerge Clash: Tower DefenseFree4.8★ (14K)YesYesAug 2026
3Merge Gun: Tower DefenseMerge Gun: Tower DefenseFree4.7★ (1.5K)YesYesAug 2026
4Shooting Tower: Defense GameShooting Tower: Defense GameFree4.7★ (16K)YesNoAug 2026
5Merge Tactics: Castle DefenseMerge Tactics: Castle DefenseFree4.7★ (891)YesYesAug 2026
6North Tower! Merge TD DefenseNorth Tower! Merge TD DefenseFree4.7★ (852)YesYesAug 2026
7FireLine: Merge DefenseFireLine: Merge DefenseFree4.6★ (531)YesYesAug 2026
8Merge Kingdoms - Tower DefenseMerge Kingdoms - Tower DefenseFree4.8★ (2K)YesYesAug 2026

Top Picks for Merge Tower Defense 2021

Merge Tower Defense 2021#1

Merge Tower Defense 2021 by Lazycell Inc.

Drag and Merge
Editor's Choice
🎮 Games
4.3(32 ratings)
FreeAds
Merge Tower Defense 2021 screenshot 1
Merge Tower Defense 2021 screenshot 2
Merge Tower Defense 2021 screenshot 3

A simple tower defense game where you drag and merge towers to level them up. Defend your gem from enemies and bosses with increasingly powerful defenses. Test your tactical skills in this classic genre.

Merge Clash: Tower Defense#2

Merge Clash: Tower Defense by Block Puzzle Games

Tower Defense Games Random PvP
Strong Contender
🎮 Games
4.8😐(14K ratings)
FreeAdsIn-App Purchases
Merge Clash: Tower Defense screenshot 1
Merge Clash: Tower Defense screenshot 2
Merge Clash: Tower Defense screenshot 3
Merge Clash: Tower Defense screenshot 4
Merge Clash: Tower Defense screenshot 5
Merge Clash: Tower Defense screenshot 6

Engage in strategic tower defense battles by collecting, merging, and upgrading unique towers. Defend your kingdom against waves of enemies and epic bosses in both solo and multiplayer modes. Master deck building and tactical deployment to outwit opponents.

What We Love

  • 🚀 Fun and addictive gameplay
  • 👍 No ads
  • 🤝 Enjoyable co-op mode
  • 💡 Unique merge-based tower defense concept

Room to Improve

  • 🐛 Frequent crashes and bugs
  • 💰 Pay-to-win mechanics
  • 🎲 Overly reliance on RNG and luck
Merge Gun: Tower Defense#3

Merge Gun: Tower Defense by HAPIGA VIET NAM COMPANY LIMITED

Merge to defend
Worth Considering
🎮 Games
4.7(1.5K ratings)
FreeAdsIn-App Purchases
Merge Gun: Tower Defense screenshot 1
Merge Gun: Tower Defense screenshot 2
Merge Gun: Tower Defense screenshot 3
Merge Gun: Tower Defense screenshot 4
Merge Gun: Tower Defense screenshot 5
Merge Gun: Tower Defense screenshot 6

Merge and upgrade towers to defend your realm against waves of monsters. This game offers simple, engaging gameplay with strategic depth for countless challenges. Enjoy stunning graphics and lively sound in this free-to-play tower defense experience.

More Merge Tower Defense 2021 apps to explore

4
Shooting Tower: Defense Game
Shooting Tower: Defense Game
Shooting Tower: Defense Game
Merge guns and guard the base
Free

Engage in an intense shooting and strategy game where you merge defensive towers to repel waves of monsters, orcs, and aliens. Develop tactical formations and upgrade your war machines to protect your base and survive challenging boss attacks.

Merge towers for upgradesStrategic tower placementRepel diverse enemy waves
🎮 Games
(16K)
free with in-app purchases
5
Merge Tactics: Castle Defense
Merge Tactics: Castle Defense
Merge Tactics: Castle Defense
Merge TD - Block the Invaders
Free

This tower defense game challenges players to strategically place and merge blocks to create powerful units. Build diverse decks and expand your territory to fend off waves of invaders, while growing your castle and characters for enhanced skills and rewards.

Strategic block placementMerge blocks into powerful unitsCreate custom battle decks
🎮 Games
(891)
free with in-app purchases
6
North Tower! Merge TD Defense
North Tower! Merge TD Defense
North Tower! Merge TD Defense
3D Tower Defense Strategy Game
Free

Merge weapons to power up your army and defend your land in this 3D tower defense strategy game. Combine merge, clicker, and idle gameplay to defeat enemies and bosses. Unlock heroes and battle other players for rewards.

Merge weapons to power upBuild and grow your armyStrategic tower placement
🎮 Games
(852)
free with in-app purchases
7
FireLine: Merge Defense
FireLine: Merge Defense
FireLine: Merge Defense
Best merge tower defense game
Free

Engage in an addictive tower defense experience where you merge cannons to create powerful upgrades. Strategically position your enhanced defenses to repel waves of cube enemies and formidable bosses.

Merge cannons for upgradesStrategic defense positioningDefeat cube armies
🎮 Games
(531)
free with in-app purchases
8
Merge Kingdoms - Tower Defense
Merge Kingdoms - Tower Defense
Merge Kingdoms - Tower Defense
Merge your defenses!
Free

Engage in a unique tower defense experience with idle progression. Combine towers to enhance their power and strategically place them to overcome thousands of enemy waves. Unlock new abilities and power-ups to conquer increasingly challenging stages and bosses.

Merge towers to level up defensesThousands of enemy waves35+ unique enemy types
🎮 Games
(2K)
free with in-app purchases
9
Merge Tower Defense 3D
Merge Tower Defense 3D
Merge Tower Defense 3D
Merge and unlock various hero
Free

Merge and defend your kingdom against a horde of monsters using strategic tower defense gameplay. Unlock and combine over 30 unique characters to create powerful heroes and overcome challenging boss fights. Enjoy top-notch graphics and sound in this relaxing yet exciting game.

Merge gameplay mechanicsTower defense strategyUnlock 30+ characters
🎮 Games
(0)
free with in-app purchases
10
Merge Tower : Defense Dragon
Merge Tower : Defense Dragon
Merge Tower : Defense Dragon
by Tenyoko Entertainment Inc
Free

Merge combat and defense components to reinforce your castle against nightly dragon invasions. Synthesize identical objects to create more advanced defenses and collect treasure chests for extra moves. Protect your castle walls from dragon attacks in this offline-ready game.

Merge components to upgrade defensesDefend castle from dragon attacksSynthesize identical objects
🎬 Entertainment
(1)
free with in-app purchases
11
Defense Game: Merge Battle
Defense Game: Merge Battle
Defense Game: Merge Battle
Defense Merge Survival Game
Free

Engage in strategic battles by merging and upgrading weapons to defend your room from waves of monsters. Command your defenses and defeat enemies in this intense tower defense experience.

Merge and upgrade weaponsDefend your roomDefeat waves of monsters
🎮 Games
(4)
free with in-app purchases
12
Fusion Tree:Yggdrasill
Fusion Tree:Yggdrasill
Fusion Tree:Yggdrasill
by Raven Williams
Free
🎮 Games
(0)
13
Merge Defense 3D!
Merge Defense 3D!
Merge Defense 3D!
Strategic Tower Defense
Free

A turn-based tower defense game where players strategically place and merge defenders to fend off advancing enemy blocks. It offers offline play and a challenging puzzle experience for a daring mind.

Turn-based gameplayMerge defenders to upgradeStrategic placement
🎮 Games
(1.1K)
free with in-app purchases
14
Merge Tower – Zombie Defense
Merge Tower – Zombie Defense
Merge Tower – Zombie Defense
Turret Merge Defense
Free

Merge and build a robot army to defend your land from an evil zombie invasion. This idle clicker game combines merging mechanics with tower defense strategy for hours of addictive gameplay.

Merge turrets to power them upCollect coins offlineStrategically place robots for defense
🎮 Games
(4)
ad-supported
15
Merge'n Defense
Merge'n Defense
Merge'n Defense
Merge, Defend, Conquer!
Free

Engage in a strategic tower defense experience that combines merge mechanics with action. Defend your castle by merging obstacles to enhance their power and unlock abilities. Explore new levels and strategies in this visually appealing game.

Merge mechanics for stronger defensesStrategic obstacle placementAction-packed tower defense gameplay
🎮 Games
(2)
ad-supported
16
Turret Merge Defense
Turret Merge Defense
Turret Merge Defense
Best Merge & Defense games
Free

Combine turrets to create powerful defenses and battle through over 1500 stages across 15 worlds. Upgrade your turrets with special abilities and compete globally in this one-finger merge and defense game.

16 unique turrets with special abilities15 world maps with over 1500 stagesBoss battles with unique skills
🎮 Games
(18)
free with in-app purchases
17
2048TD: Merge Tower Defense
2048TD: Merge Tower Defense
2048TD: Merge Tower Defense
Smash Hit Tower Defense
Free

Combine 2048 puzzle mechanics with tower defense strategy. Merge and upgrade towers with unique power-ups to obliterate waves of enemies. Experience evolving defenses and challenging levels.

2048 merge mechanicsStrategic tower defenseTower power-up upgrades
🎮 Games
(2)
free with in-app purchases
18
Tower Defense:Defend Base Game
Tower Defense:Defend Base Game
Tower Defense:Defend Base Game
destroy enemies with turrets
Free

Strategically place and upgrade various towers to defend your home against endless waves of enemies. Adapt your tactics to diverse enemy types and challenging map layouts to emerge victorious.

Unique tower defense strategyBuild and upgrade four tower typesChallenging map layouts
🎬 Entertainment
(19)
ad-supported
19
Grid Guardians
Grid Guardians
Grid Guardians
Epic Challenging Tower Defense
Free

Engage in a challenging tower defense strategy game where you merge, build, and upgrade towers to defeat waves of enemies. Master tactical placement and utilize explosive abilities across campaign and endless modes.

Merge towers to power up defensesStrategic grid placementUtilize boosters and abilities
🎮 Games
(14)
free with in-app purchases
20
Save The Kingdom: Merge Towers
Save The Kingdom: Merge Towers
Save The Kingdom: Merge Towers
Defeat all enemies
Free

Build, upgrade, and merge towers to create an impenetrable defense against waves of enemies. Conquer over 10 maps with diverse challenges and compete with friends on leaderboards. Immerse yourself in a visually stunning world with vivid sound effects.

Build, upgrade, and merge towersOver 20 tower levels to mergeConquer 10+ unique maps
🎮 Games
(122)
free with in-app purchases

FAQ about Merge Tower Defense 2021

What are the best merge tower defense 2021 apps & games for iPhone?
Merge Tower Defense 2021 tops our merge tower defense 2021 apps & games ranking as of August 2026, with a 4.3-star average from 32 App Store ratings, and it's free to download.
Yes — 20 of the top merge tower defense 2021 apps & games we rank are free to download, including Merge Tower Defense 2021 and Merge Clash: Tower Defense.
Merge Tower Defense 2021 shows ads and has no in-app purchases, according to its App Store listing as of August 2026.
We track 233+ merge tower defense 2021 apps & games on the iOS App Store as of August 2026, ranked by rating, recency, and analysis of real user reviews.
The main gameplay involves dragging and merging your towers to level them up. This creates more powerful defenses to protect your gem from incoming enemies and bosses.
The provided data does not specify if Merge Tower Defense 2021 supports offline play. Many tower defense games offer offline modes, but this feature is not explicitly mentioned.