Default [Q] Modify game without root

Hi,

Is it possible to modify game that requires network connection to play without root?
Eg Speed up the game, max stats and etc.

The game I am playing is quite similar to Tower of Saviour. But I encountered some problems during playing.
When I posted the problems at the game forum, there are few players said I use some hack tool to the game.
In fact I just bough s3 last year and my warranty is still valid.

I get very furious for this kind of accusation. Is there any way to modify game like this?
As far as I concern:

1. there are no one hack tool that is capable to modify every game out there
2. it requires root to use the hack tool
3. hack tool modification does not applicable to game that requires network connection
4. even using software like bluestacks on pc also unable modify the data without root access

I believe modded apk may can get the hack result but it is not a very common game, and especially the game is in Chinese.
There's no modded apk for this game so far, at least I unable find it.

Please correct me if I am wrong.