The biggest reason is that hacking into game apps is easy.
One more reason is that the purpose is clear.What do game players want?
Tamper finding major data like item or score in game,Memory Searching is the method malicious user hacks into game memory and revises game score or capacity of item.
Fabrication by desired form normal app, 'Repacking'This is how to extract game apps (APKs) from your mobile phone, repackage your code, and then repackage it.
Bypassing In-App PaymentsMany of the latest mobile games are supposed to be paid on the game to sell smooth items, which are increasingly being attacked by many hackers to make unfair profits.