The best level systems play nice with others. Whether you are running , Deathrun , or Jailbreak , your level system should be able to hook into these mods to reward specific actions (like infecting a human or finishing a map). How to Install a CS 1.6 Level System

Look for popular versions like "OciXCrom's Rank System" or "Advanced Level System" on AlliedModders.

Moving from "Newbie" to "Global Elite" or custom military ranks.