Why can't I get Dungeon hunter to install on my Lumia 520?

[WPCentral Question]

Dungeon hunter 4 game not installing in lumia 520

My phone is 520 & i've downloaded the game dungeon hunter 4 from windows phone store site bcoz it is bigger...so i want to install it from SD card, when i tried to, it says unsupported apps or games . . .what to do