Some Infinity Blade II users playing on iPad 1 and iPad touch devices have been experiencing problems, but Epic is on the case and working on a quick fix.
Posting on the Epic Games community forum, Epic Games VP Mark Rein explained the situation.
"For some users Infinity Blade II seems to be running out of memory on their heavily laden iPad1 and iPod Touch devices.
"For example if you have a large number of apps installed iOS must cache all those icons to give you smooth performance when you hit the home button. Unfortunately the machines we tested on didn't have massive numbers of apps installed on them so we think this how we think we missed this particular condition.
"We're working on a quick fix and will submit an update to the store as soon as possible."
Epic has updated the description on iTunes to warn potential buyers that they may experience problems on older hardware.
In the meantime, Epic advises that players take the following steps to enable the best possible play experience.
"When apps run of memory at loading time that is something that is often fixed by restarting your device," said Rein. "So I recommend that people try restarting their device to see if that solves it for them. I say this because the game runs fine on my iPad1 which I restarted before playing the game.
"Here's how Apple recommends you properly restart an iOS devices: First turn the device off by pressing and holding the Sleep/Wake button until a red slider appears. Slide your finger across the slider and the device will turn off after a few moments. Next, turn it on by pressing and holding the Sleep/Wake button until the Apple logo appears then wait for it to continue booting up."
Infinity Blade II is a universal app priced £4.99.