Every kill, headshot, and objective completion grants Experience Points (XP).

Place any configuration files ( .cfg or .ini ) in addons/amxmodx/configs/ .

Most CS 1.6 level systems are built on the framework. Here is the general workflow:

AES is a powerhouse for servers that want a "Call of Duty" feel.

A lightweight alternative for those who want to keep the server "vanilla-plus." It focuses purely on the leveling mechanic without bloating the server with extra features. How to Install a Level System Plugin

If you are looking for stability and customization, is widely considered the best in the scene.