Welcome to the official site of the CLEO library (or simply CLEO) - a hugely popular extensible plugin for the Grand Theft Auto games series by Rockstar Games, allowing the use of thousands of unique mods which change or expand the gameplay.
There are different versions of CLEO made for GTA III, GTA Vice City and GTA San Andreas.
Using CLEO it's possible to add custom scripts written with Sanny Builder or another script editor to the game without starting a new game.
Adding and removing a script is as easy as copying and deleting a file in the CLEO folder.
These third-party scripts are entirely user-made and are in no way supported by the developers of this library.
While CLEO itself should work in a wide range of game installations, individual scripts are known to have their own compatibility restrictions and can not be guaranteed to work.
View details » CLEO 4 adds 100 useful scripting commands (opcodes) that make possible to work with external files, to change the game memory, to call exe functions with custom parameters and much more.
New opcodes were added in the fourth version to play audio streams, to format strings, to display custom texts on screen without using external text files (.fxt, .gxt).
To assess all the achievements and use them in your scripts, install the latest version of the CLEO library.
View details » CLEO plugins are dynamic libraries having the . At startup, the CLEO library scans the CLEO folder for the files with that extension and tries to load them.
If successful, the plugins begin to work and do what they were made for.
CLEO 4 allows to make new opcodes using sources of the CLEO SDK.