A substantial archive containing a plethora of old iPhone games and applications has been discovered in one of the world’s largest internet archives, Wayback Machine, reports Eurogamer.

This archive, amounting to 1.2 TB, originates from Apple’s TestFlight service, which enables developers to share beta versions of their applications. Many of these old app versions, dating from 2012 to 2015, have long been unavailable for download directly from TestFlight.

The files unearthed from the archive include prototypes and beta versions of games and apps that never made it to public release on the App Store. Notably, the Wayback Machine archive features unreleased versions of popular titles like Angry Birds, Obamagram, and Temple Run.

Enthusiasts have already compiled a searchable list of these discovered applications, formatted for ease of use. The 2015 archive alone boasts over 76,000 games and applications.

The leak may have resulted from improperly configured cloud storage, as links on Wayback Machine include references to Amazon CloudFront and S3 services for Amazon Web Services.

The cache was uploaded to the internet archive in March 2015 following the shutdown of the old TestFlightApp.com site by Apple, which acquired TestFlight in early 2014. At that time, the service allowed for the testing of apps on both iOS and Android platforms.