Series 12

The twelfth series of The Crystal Maze Online Adventure was produced from April 10 through TBC, 2021. Hosted by Robert, the series consisted of nine teams.

Bookings for the series took place through The Crystal Maze Online Adventure Facebook group. On April 11, 2021, Duffy's Darlings won the series over Serial Escape the Review Roomers and The Ready Freddies respectively.

Development
A twelfth series was announced on April 3, 2021. The aesthetics changed once more following the Series 8 revamp retaining its homage to the original television series with a more vibrant and simplistic feel. The series features twelve teams competing, an increase over the last two series and the original four zones being in circulation for the third consecutive series.

A major change was the shift away from using external websites to host the games, opting for editing software to permit the host to introduce more interactive features. Games from previous series were overhauled, with new rules introduced.