Best Merge Tower Defense 2021 Apps & Games

213+ iOS apps & games curated and reviewed

4.5 avg rating
20 free apps & games
Updated May 2026

The best merge tower defense 2021 apps on iPhone average 4.5โ˜… across 213+ titles โ€” we've ranked them by what real users actually keep on their phones. Updated May 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
๐ŸŽฎ 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.

Rush Royale: Tower Defense RPG#2

Rush Royale: Tower Defense RPG by MYGAMES MENA FZ LLC

PvP Card battleใƒปMerge Strategy
Strong Contender
๐ŸŽฎ Games
4.5๐Ÿ˜(94K ratings)
FreeAdsIn-App Purchases
#65in Games
Rush Royale: Tower Defense RPG screenshot 1
Rush Royale: Tower Defense RPG screenshot 2
Rush Royale: Tower Defense RPG screenshot 3
Rush Royale: Tower Defense RPG screenshot 4
Rush Royale: Tower Defense RPG screenshot 5
Rush Royale: Tower Defense RPG screenshot 6

Collect and merge units to build a powerful deck for strategic base defense. Engage in PvP battles or team up with friends in Co-Op mode to conquer enemies and earn rewards. Master unique unit abilities and faction synergies to prevail.

What We Love

  • ๐Ÿš€ Fun and addictive gameplay
  • ๐Ÿ‘ Good casual game for short sessions
  • ๐Ÿ’ก Unique tower defense mechanics
  • ๐ŸŽจ Vibrant and colorful visuals

Room to Improve

  • ๐Ÿ’ฐ Heavily pay-to-win model
  • ๐Ÿ”€ Matchmaking issues and unfair pairings
  • ๐Ÿ› Frequent connection issues and bugs
Merge Clash: Tower Defense#3

Merge Clash: Tower Defense by Block Puzzle Games Inc.

Tower Defense Games Random PvP
Worth Considering
๐ŸŽฎ Games
4.8๐Ÿ˜(12K 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

  • ๐Ÿš€ Fun and addictive gameplay
  • ๐Ÿ‘ No ads
  • ๐Ÿค Enjoyable co-op mode
  • ๐Ÿ’ก Unique merge-based tower defense concept

Room to Improve

  • ๐Ÿ› Frequent crashes and bugs
  • ๐Ÿ’ฐ Pay-to-win mechanics
  • ๐ŸŽฒ Overly reliance on RNG and luck

More Merge Tower Defense 2021 apps to explore

4
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
๐ŸŽฎ Games
(1.9K)
free with in-app purchases
5
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
๐ŸŽฎ Games
(16K)
free with in-app purchases
6
Power Painter: Shoot & Defense
Power Painter: Shoot & Defense
Power Painter: Shoot & Defense
Paint Ball & Merge Tower Game
Free

Engage in a strategic merge and tower defense game where you merge towers, shoot paint bubbles, and defend against bosses. Progress through increasingly challenging levels with stunning graphics and collect various paintball guns to aid your defense.

Merge towersShoot paintball bubblesPaint the screen
๐ŸŽฎ Games
(47K)
free with in-app purchases
7
The Tower - Idle Tower Defense
The Tower - Idle Tower Defense
The Tower - Idle Tower Defense
Base defense, kill the enemy
Free

Build and upgrade a single tower to defend against waves of enemies in this incremental tower defense game. Make permanent upgrades, unlock new areas, and compete in tournaments. Enjoy addictive gameplay with a vast array of strategic choices.

Build and upgrade a single towerDefend against enemy wavesPermanent upgrades and research
๐ŸŽฎ Games
(19K)
free with in-app purchases
8
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
๐ŸŽฎ Games
(845)
free with in-app purchases
9
Merge Defense 3D!
Merge Defense 3D!
Merge Defense 3D!
Strategic Tower Defense
Free

Merge Defense 3D is a strategic tower defense game where players merge defenders to upgrade their power and protect against advancing enemy blocks. With challenging brain puzzles, simple controls, and free offline play, it's the perfect game for daring minds. Survive as long as you can and have fun!

๐ŸŽฎ Games
(1.1K)
10
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
๐ŸŽฎ Games
(889)
free with in-app purchases
11
Crazy Defense Heroes: RPG TD
Crazy Defense Heroes: RPG TD
Crazy Defense Heroes: RPG TD
Tower Defense Strategy Game
Free

Build and upgrade towers, collect hundreds of cards, and command heroes to defend your kingdom. Engage in strategic battles against hordes of enemies across over 1,000 levels. Join forces with other players for epic clan quests and boss fights.

Tower defense strategyCollect over 400 cardsCombine Hero, Tower, Spell, and Equipment cards
๐ŸŽฎ Games
(8.1K)
free with in-app purchases
12
Merge Gun: Tower Defense
Merge Gun: Tower Defense
Merge Gun: Tower Defense
Merge to defend
Free

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.

Merge and upgrade towersStrategic defense planningDefend against monster waves
๐ŸŽฎ Games
(1.1K)
free with in-app purchases
13
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
๐ŸŽฎ Games
(531)
free with in-app purchases
14
Fortress Merge
Fortress Merge
Fortress Merge
Roguelike City Defend Game
Free

Engage in strategic city defense by merging and upgrading buildings to fend off relentless enemy waves. This action-packed puzzle game challenges you to plan your moves carefully and use resources wisely to survive. Immerse yourself in exciting gameplay with stunning graphics and fast-paced action.

Merge and upgrade buildingsStrategic gameplay and resource managementDefend against enemy waves
๐ŸŽฎ Games
(9.7K)
free with in-app purchases
15
Crazy Kings Tower Defense Game
Crazy Kings Tower Defense Game
Crazy Kings Tower Defense Game
Fight Strategic TD Battles
Free

Engage in strategic tower defense battles across diverse environments. Collect and upgrade over 90 cards, including heroes, towers, spells, and equipment, to defeat over 100 types of enemies and challenging bosses. Compete in daily battles and weekly tournaments for rewards.

Over 90 collectible cards20+ specialized towers20+ diverse spells
๐ŸŽฎ Games
(1.8K)
free with in-app purchases
16
Tank Fortress - tower defense
Tank Fortress - tower defense
Tank Fortress - tower defense
Merge, Build and Fire!
Free

Build a mobile fortress, merge tanks to unlock powerful weapons, and defend against rogue machines. Engage in strategic battles, compete with other players globally, and enjoy idle progression with rewards.

Merge and evolve unique tanksBuild a movable fortressReal-time online PvP battles
๐ŸŽฎ Games
(183)
free with in-app purchases
17
AmaZeus: Merge & Shoot
AmaZeus: Merge & Shoot
AmaZeus: Merge & Shoot
Roguelike tower defense!
Free

Defend the world from monster waves by merging weapons to unlock powerful upgrades. Experiment with unique skill combinations to unleash devastating effects and overcome challenging stages. Save the world with strategic combat and simple controls.

Merge shooters to power upDefeat waves of monstersStrategic skill combinations
๐ŸŽฎ Games
(1.4K)
free with in-app purchases
18
Brave Merge - Battle & Defense
Brave Merge - Battle & Defense
Brave Merge - Battle & Defense
The undead are attacking!
Free

Defend your kingdom from an undead invasion by merging warriors to create powerful knights. Build and upgrade village structures to generate passive income and invest in your army's defense. Strategize your battles against zombie hordes and fearsome bosses in this adventure game.

Merge warriors to level upUnlock village buildings for passive incomeUpgrade buildings with a second currency
๐ŸŽฎ Games
(5.5K)
free with in-app purchases
19
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
๐ŸŽฌ Entertainment
(1)
free with in-app purchases
20
Towerlands: Tower defense (TD)
Towerlands: Tower defense (TD)
Towerlands: Tower defense (TD)
Build base & protect Kingdom
Free

Build and defend your fantasy kingdom in this strategy simulation game. Recruit heroes, upgrade towers, and conquer enemy cities. Engage in tactical warfare, join clans, and compete in global tournaments.

Strategic empire buildingTactical warfare and hero managementConquer and expand territory
๐ŸŽฎ Games
(7.3K)
free with in-app purchases