BTD X is a fanmade game that is based on the popular Bloons TD game. The game was created by Ramafparty and later edited for Android by Albiot1. BTD X offers a wide variety of bloon types, 24 different monkeys, and various challenges to keep the players engaged.

The game is set in a tower defense format, where the players need to defend their base from the incoming bloons by placing different types of monkeys with unique abilities. The bloons come in various colors, each with different strengths and weaknesses. Players can upgrade their monkeys with experience points and money earned from popping bloons. The game also offers a variety of challenges, such as daily challenges and special events, that keep the game fresh and exciting.

Overall, BTD X is a fun and engaging game for fans of the tower defense genre. The game offers a lot of content with its different bloon types, monkeys, and challenges. The game is free to play and can be downloaded from the Google Play Store.