In an attempt to fix the problem I have been having (see post "Lumia 620 Windows phone 8 graphical bug") I decided to reset my phone to see if that would make a difference.
when I tried to reinstall skulls of the shogun I couldn't find it in the store any more. eventually I found it when looking on the windowsphone.com website under my purchase history. the worrying thing is that it had the message "Your phone doesn't meet the minimum requirements needed to run this app". So I'm now in a situation where I can't even download it any more.
I spoke to someone at Microsoft to see if they had any ideas and they just said ask the developers. Have the requirements been changed recently? Has the game been pulled for the Lumia 620? How come I could download it before?