How do you hack a game

depends on what kinda of game like if you want you can easy hack runescape with the knowlage and the programs like cheat engine to turn 100gp into 9999m and trade it you will have to have a weilling freind to receive or give to you but he can't report you or you will lose the money bascily use cheat engine on the trade screen offer 5 gp and use cheat engine then offer 10 use cheat engine once you find the last 1 or 2 change to 9999m and click freeze in cheat engine themn hit trade then log of.
and it will give the person 9999mill /\/ () () |3 $