How to play games without internet connection on iPhone?

I have an iPhone 4 with iOS 6.1.2.
When I launch games like Zenonia 5 or Dead Trigger, Zenonia 5 asks for internet connection and Dead Trigger crashes if I'm not connected to Wi-Fi, but the both of them run perfectly when I'm connected, and of course I don't want that. I want to play whenever I want without the need of being connected to the internet.
Is there any method that would let me bypass the check? Or a way that would disable that check and make me appear as connected to that app?
Thanks in advance!

Added (1). Forgot to mention: that these 2 games can be played offline. I mean they aren't MMOs (single player story line).so.

Some games need an Internet connection some don't. If you don't have Wi-Fi you can only play games that don't need one. That can't be changed its all in how the game was programmed to run.