Bloon TD 6 is a tower-defense strategy game offered by ninja kiwi. It has more than millions of downloads on the play store. Build your tower defense with amazing powerful monkeys & heroes and pop all the incoming bloons.
Gameplay

In this game, bloons will come flying into your town. You have to stop all the bloons by placing monkey towers in the town. There is a defined path that all bloons will follow to cross the town. So you have to place towers at the right position where it defends effectively. There are many types of bloons so you need to place a monkey tower that can counter them or they will go past you easily. For example, camo bloons can’t be detected by monkeys if they don’t have enhanced eyesight or any skills to detect them. Lead bloons can’t be destroyed with darts or sharp things. Use heroes, monkey knowledge, power-ups and money towers to defend the town.
Money Units

There are 22 monkey towers divided into primary, military, magic & support. Each monkey has a unique playstyle. There are 3 paths to upgrade the monkey, each containing 5 upgrades. You can upgrade all five tiers of any one path and 2 tier upgrades of one of 2 other paths and the third path will be locked. Only one monkey in the map can have the 5th tier upgrade of one path. Because 5th tier upgrades are so powerful. So even with one monkey, you can make 6 super-monkeys, each with a different playstyle with these upgrades.
Monkey Knowledge

In the monkey knowledge, you can unlock knowledge that affects the attributes of monkeys permanently. There are 6 knowledge trees for primary, military, magic, support, heroe and power-ups. When your level reaches level 30, you start getting knowledge points that you can use to unlock new knowledge. Fast tack attacks knowledge increases the attack speed of all tack shooters, force vs force knowledge increases the damage of juggernaut per shot to MOAB class bloons. These are just 2 examples of knowledge. Play the game and unlock all knowledge. Knowledge effects remain effective in all battles.
Heroes

Use 12 powerful heroes to pop the bloons. Each hero has 2 unique abilities. You can upgrade heros upto 20 levels to increase their damage, speed, range and unlock new skills. They also grant monkeys buffs. With these heroes, you can come up with many new synergies.
Maps & Difficulty Levels

Play in more than 60 awesome maps with unique paths & objects. There are some objects that can also block your line of sight. Each map has 3 difficulties: easy, medium & hard. In easy difficulty, bloons are slower, monkeys have low cost, your HP is 200 and you have to complete 40 rounds. In medium difficulty, normal monkey cost & bloons movement speed, your hp is 150 and you complete 60 rounds. In hard difficulty, monkeys have high cost, bloons move faster, you get 100 hp and have to complete 80 rounds. Each difficulty has many game modes like standard, selected monkeys only, sandbox, double health, chimps, half cash etc.