Cheat Engine (developed by Eric "Dark Byte" Heijnen) is an open-source memory scanner and debugger. Unlike mods that change game files, Cheat Engine reads your computer’s RAM in real-time. When you score a goal in FIFA, the number "1" temporarily lives in a specific memory address. Cheat Engine finds that address and allows you to change the "1" to a "99."
In Cheat Engine, select FIFA 15 from the process list and click "Attach." fifa 15 player career mode cheat engine
: Never use Cheat Engine while connected to EA servers or in Ultimate Team, as this can result in a permanent ban. Cheat Engine (developed by Eric "Dark Byte" Heijnen)
Decide on an attribute you want to modify (e.g., a player's overall rating). Use Cheat Engine to scan for the current value and then modify it. This process can be complex and requires patience. Cheat Engine finds that address and allows you
View topic - [FIFA 15] Edit Career mode - Cheat Engine Forum
If you don't have a pre-made table, you can still find values like your player's or Transfer Value using standard scans: Note the current value (e.g., 500 XP). Scan for that Exact Value (4 Bytes) in Cheat Engine.