CLEO (CLEO Library) is a modification library for GTA San Andreas that allows users to add custom scripts to the game. Developed by a dedicated community, CLEO mods are designed to enhance gameplay, add new features, and provide a level of customization that wasn't possible in the original game. The CLEO Mod 2.10 APK is one of the most popular and widely used mods available for GTA San Andreas on Android.