A federal lawsuit filed Wednesday claims that popular App Store app developer Storm8 may have bypassed safeguards in order to obtain data such as phone numbers via games downloaded over 20 million times.

World War, iMobsters, Racing Live, Vampires, Kingdoms, Zombies Live, Rockstars Live and Ninjas Live are some of the iPod Touch and iPhone titles listed on Storm8’s website. Court documents point to “secret code” written into games to circumvent protections preventing apps from collecting data on unsuspecting users:

“…Storm8 makes use of the ‘backdoor’ method to access, collect, and transmit the wireless phone numbers of the iPhones on which its games are installed,” states the complaint, which was filed in US District Court in Northern California. “Storm8 does so or has done so in all of its games.”

The Register points to a column written back in August about privacy concerns and the iPhone. The columnist highlights data-gathering in Storm8’s Vampires Live mini MMORPG:

One of the best selling iPhone app is Vampires Live, a very cool game which is a take off from