7 Best Free Tower Defense Games for Android
Tower defense is the thinking person's action genre. You study a path, place your towers in the perfect spots, upgrade them at the right moment and watch your plan either hold the line or fall apart. It is the ideal mobile genre: matches are quick, you can play one-handed, and a good defence feels like solving a puzzle. Here are seven of the best free tower defense games on Android, checked against their official Google Play listings, with an honest note on which ones work offline.

Photo by Anuja Dangol from Pexels. This is a free stock illustration and does not show any of the games in this list.
1. Plants vs. Zombies 2
Plants vs. Zombies 2, developed by Electronic Arts, is the tower defense game that everyone knows. You plant sunflowers, pea shooters and wall-nuts to stop waves of zombies from reaching your house, and each level asks you to choose the right plants for the right zombies. The campaign can be played offline, which makes it perfect for a flight or a commute, and the game is free to download with in-app purchases. A decade after launch, it is still the most charming tower defense game on any phone. Download Plants vs. Zombies 2 on Google Play
2. Infinitode 2
Infinitode 2, from Prineside, is the tower defense game for players who love numbers, upgrades and endless waves. It is a minimalist tower defense with a huge research tree: you mine resources, unlock new towers and push your defence further with every run. The game is free to download with in-app purchases, and it works fully offline, so you can keep playing anywhere. If you like tower defense as a strategy puzzle rather than a cartoon, this is the one. Download Infinitode 2 on Google Play
3. Bloons TD Battles 2
Bloons TD Battles 2, developed by Ninja Kiwi, takes the classic Bloons tower defense and turns it into a head-to-head battle. You send bloons at your opponent while building your own defences, so every match is a race between your attack and your opponent's defence. It is free to download with in-app purchases, and because it is a player-versus-player game, it needs an internet connection. The cartoon monkeys are charming, but the competition is serious. Download Bloons TD Battles 2 on Google Play
4. Random Dice
Random Dice, developed by 111%, is a cooperative tower defense where you and a partner combine random dice to build towers and stop waves of enemies. The dice merge into stronger towers, so every run plays differently, and the cooperative mode makes it a great game to play with a friend. It is free to download with in-app purchases, and it is an online game. Download Random Dice on Google Play
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5. Defense Zone 3
Defense Zone 3, developed by ARTEM KOTOV, is a tough, no-nonsense tower defense with detailed graphics and brutal difficulty. You place eight types of towers along a winding road, upgrade them between waves, and try to hold back air and ground assaults. The game is free to download with in-app purchases, and it works offline, so you can defend without a connection. This is the pick for players who want a challenge. Download Defense Zone 3 on Google Play
6. Grow Castle
Grow Castle, from RAON GAMES, is a tower defense game about building and upgrading a castle that never stops growing. You hire heroes, place archers and cannons in the castle's towers, and defend against endless waves of enemies while your castle gains new floors. It is free to download with in-app purchases, and it works offline. The idle elements mean your castle keeps growing even when you are not looking. Download Grow Castle on Google Play
7. The Battle Cats
The Battle Cats, developed by PONOS, is a tower defense game starring an army of cats. You deploy cats with different abilities to defend your base and push back waves of enemies, from simple dogs to bizarre bosses. The game is free to download with in-app purchases, and it needs an internet connection for most features. It is the silliest game on this list, and one of the most addictive. Download The Battle Cats on Google Play
If you want a tower defense game that works offline, start with Plants vs. Zombies 2, Infinitode 2, Defense Zone 3 or Grow Castle. If you want to play against real people, Bloons TD Battles 2 and Random Dice are the online picks, and The Battle Cats is the fun one to try when nothing else will do.
Source: Google Play — official store listings for Plants vs. Zombies 2, Infinitode 2, Bloons TD Battles 2, Random Dice, Defense Zone 3, Grow Castle and The Battle Cats https://play.google.com/store