The Revini source is a classic example of an or simple External cheat. Unlike internal cheats (which inject a DLL into the game process), Revini typically runs as a separate standalone application (an .exe file) that reads and writes to the game's memory from the outside.
A typical rev.ini is stored in the root installation folder of Counter-Strike: Source (alongside hl.exe or srcds.exe ). It is divided into logical, bracketed sections. Below is an authoritative breakdown of its structure: revini cs source