Alien Annihilation Agent is a free strategy game available on Android devices. The game is set in the future where resources have depleted, and humans have started mining Solstone mineral on planet Erga. However, the wild Erganid creatures start attacking human bases, and mankind is on the verge of extinction. The game's goal is to prevent the enemy from entering the base by deploying and upgrading various towers.

The game is easy to play with an intuitive interface and low entry barriers. The player can build different towers with specific attack capabilities and upgrade them to improve attack power, range, and attack speed. As the game progresses, the enemies become stronger, making tower upgrades essential.

Overall, Alien Annihilation Agent is an addictive strategy game that provides a fun gaming experience for players of all levels. Download it now and enjoy playing anywhere, anytime on your mobile device.