Core Tower Defense is a free Android game developed by Skylines Games. The game falls under the strategy subcategory and is all about defending your core against the enemy. The game's objective is to earn money and improve your towers to ensure that your core is safe from the enemy.

The game features an array of towers to choose from, each with its unique abilities. You can upgrade your towers to increase their strength and unlock new abilities. As you progress through the game, you'll face tougher enemies, making it necessary to improve your towers continuously. The game also features different maps, each with unique terrain and challenges, adding to the game's replay value.

Overall, Core Tower Defense is an engaging and addictive game that is perfect for strategy enthusiasts. The game's graphics are excellent, and the gameplay is smooth and fluid, making it a joy to play. The game is entirely free, making it accessible to everyone.