No CLEO text in the main menu

CLEO didn't load. Check that CLEO.asi and bass.dll sit right next to gta_sa.exe (CLEO 4 doesn't start without bass.dll), and that your ASI loader is in place.

Where do .cs scripts go?

In the cleo folder. If a mod comes as a folder for Mod Loader, its scripts stay inside that folder and run from there.

I already have CLEO 5. Do I need CLEO 4?

If your mods work, keep it. If a LiorMods mod's scripts don't run on it (for example no traffic or gates at Azrieli Center), switch to 4.4.4 with the steps above and tell us.

The game won't start: "Bad Image" error on vorbisFile.dll

That's your ASI loader being blocked by Windows 11's Smart App Control, not CLEO. The fix takes two minutes: the ASI loader guide.

No CLEO text in the main menu

CLEO didn't load. Check that CLEO.asi and bass.dll sit right next to gta_sa.exe (CLEO 4 doesn't start without bass.dll), and that your ASI loader is in place.

Where do .cs scripts go?

In the cleo folder. If a mod comes as a folder for Mod Loader, its scripts stay inside that folder and run from there.

I already have CLEO 5. Do I need CLEO 4?

If your mods work, keep it. If a LiorMods mod's scripts don't run on it (for example no traffic or gates at Azrieli Center), switch to 4.4.4 with the steps above and tell us.

The game won't start: "Bad Image" error on vorbisFile.dll

That's your ASI loader being blocked by Windows 11's Smart App Control, not CLEO. The fix takes two minutes: the ASI loader guide.

Install guide

How to install CLEO in GTA San Andreas

The library that runs script mods. Three items into your game folder, about three minutes. We use CLEO 4.4.4, the version our mods are tested on.

Download CLEOCLEO 4.4.4 · 551 KB zip · CLEO team's official GitHub

About 3 minutes
Free
Only copies files

Before you start

What it does

Many mods are scripts: small programs in .cs files that add things to the game, like the traffic, gates and police at Azrieli Center. The game can't run them on its own; CLEO can. It's a plugin (CLEO.asi) with a cleo folder where scripts go. Scripts inside a Mod Loader mod folder run too.

LiorMods mods that need it

Azrieli Center

Needs an ASI loader first.

Already see CLEO written in the bottom-left corner of the game's main menu? You have it. Skip this guide.

Install

1Download CLEO 4.4.4 with this link: CLEO4.zip, from the CLEO team's official GitHub (about 550 KB).
2Open the zip (double-click it). You need exactly three things from it: CLEO.asi, bass.dll and the cleo folder.
3Select those three (click one, Ctrl+click the others) and copy them (Ctrl+C). Paste them into your game folder, next to gta_sa.exe (Ctrl+V).
4If Windows says bass.dll already exists, choose the option that starts with Replace: CLEO's copy is newer than the ones other mods used to ship.

Don't copy the rest of the zip. It also holds an older ASI loader (vorbisFile.dll, version 1.2) that would replace the one from our ASI loader guide, and two folders for script makers (cleo_readme, cleo_sdk).

What about CLEO 5? It's the newer line (5.4.0, March 2026), and its site offers it first. It's stricter with older scripts, and we haven't tested our mods on it yet, so for LiorMods mods use 4.4.4 for now.

Check it works

Start the game: the bottom-left corner of the main menu shows CLEO v4.4.4.
A cleo.log file appears in your game folder. It lists the scripts CLEO started.

Uninstall

Delete CLEO.asi, the cleo folder and cleo.log. Keep bass.dll if you use MoonLoader; otherwise delete it too.

Troubleshooting

Next: MoonLoader Still stuck? Write to us