Default [Q] [HELP] how to hack an Online Game to work Offline

hi, i just wanted to know how can i make some Online RPG Games work offline ? .. Like Dark Avengers ? .. i struggled all day searching for a latest version (1.5.3) hacked offline apk with no mods and cheats .. but i can't find any, so i came up with the curiosity of how can i hack it on my own so i can share others and do it on my own .. thanks for those who can help me .. i really will appreciate it so much