Gchq Christmas Card Challenge 2025 Game. The annual brainteaser aims to tickle the neurons of those hoping to work in intelligence, and comes in the form of a christmas card, sent by the national spy agency's. Gchq have just published their christmas card for 2025, with the usual festive challenge.

There are seven puzzles within the spy chief’s christmas card which uses gchq’s sites across the uk, including manchester, london, scarborough, bude and cheltenham, as. Gchq.gov.uk the gchq christmas challenge 2025.