The games are in the form of .ipg files, which are actually .zip archives in disguise[citation needed]. When unzipped, they reveal executable files along with common audio and image files, leading to the possibility of third party games. Apple has not publicly released a software development kit (SDK) for iPod-specific development. Apps produced with the iPhone SDK are compatible only with the iOS on the iPod Touch and iPhone, which cannot run clickwheel-based games. COUNT 7
QSN1 What format is used for iPod game files? ANS1 .ipg QSN2 What file format is being covered up by the use of ipg files? ANS2 .zip QSN3 What does SDK stand for? ANS3 software development kit QSN4 What is the only operating system on which iPhone SDK-made games can be played? ANS4 iOS QSN5 What file format are iPod games distributed in? ANS5 .ipg QSN6 An app produced with the iPhone SDK can only run on what devices? ANS6 iPod Touch and iPhone QSN7 Is the Apple SDK available to third-party game publishers? ANS7 not