A logger allows a bot to react to the game world as fast as the network allows, rather than relying on sluggish screen scrapers (OCR).
If you are a security researcher or a private server developer: nostale packet logger
In Nostale, every action you take — moving, attacking, chatting, opening inventory — is sent as a packet to the game server. The server processes it and replies with another packet. A logger allows a bot to react to