I rooted my device using the king root app and unrooted using king root as well my device is a titan hd e500 , I tried using root cloack , but it did not work I rooted again so I am rooted now , I resorted to downloading the first version of underworld empire from aptoide and that worked for a month but with a recent update its not possible to use older version now , when the app opens it says to install new version, I tried to may b find a way to change the older app version to the new one to make the app think its running the latest version.. Not possible. I am runing on version 4.4.2 KitKat
Assuming this is an XY problem, and the real issue is that you want to play that game:
If your device is still rooted, you could install the Xposed Framework and its Root Cloak module, which hides root from specific apps. There might be other root-hiders as well, so it cannot hurt to search (or to check in my Root Hider list ;).
For more details on the Xposed Framework and what you can do with it, you're welcome taking a look at my Collection of Xposed resources.
In the worst case, if you really need to unroot your device: SuperSU offers to do that for you. If you're using a different superuser app, there are possibilities to switch to this one. Details can be found e.g. in an article on TechRepublic: Pro tip: How to unroot your Android device so you can update – and for the more "visual people", there's even an Youtube tutorial on this.