Cheat Engine, including version 6.9 Portable, has had a dual impact on the gaming world:
I notice you're asking about "Cheat Engine 69 Portable" — that sounds like an unofficial or modified version of Cheat Engine (an open-source memory scanner/editor used for cheating in games). cheat engine 69 portable
The portable version of release 6.9 offers the exact same feature set as the standard installer but removes the need for installation. Key Features of Version 6.9 Quickly finds variables inside a game. Cheat Engine, including version 6