Here is a simple PoC for the Gameforge NosTale authentication. For more information, cf. here
not@virus &> python main.py username password
[2019-06-06 17:02:31,068][INFO] Your hex encoded code: 38386464393030222d393434342d343630352d386137652d376435648037639938646463
[2019-06-06 17:02:31,464][INFO] Another hex encoded code: 30118138823639312d327161312d340630352d388138302d316562386265616465893633
# You can also print the help for more information/options
not@virus &> python main.py -h
Thanks to WalrossGreat for your great work !