By solving this puzzle players will create an image that leads to a series of increasingly complex challenges. Once all stages have been unlocked and completed successfully, players are invited to submit their answer via a given GCHQ email address by 31 January 2016. The winner will then be drawn from all the successful entries and notified soon after.
Download the setup package of Cryptographic GCHQ Puzzle Grid 1.1 that is completely free and check out users' reviews on Droid Informer. The app can be launched flawlessly on Android 4.1 and above. This application is totally safe for downloading. The game was originally designed by Blundell Apps and it is listed among the Puzzle Games category.