Nintendo has announced that it's taking applications for thousands of participants to test out "a new feature" coming to Switch Online — but no one knows what that is.

Nintendo is asking invited testers to keep their mouths shut about what they see and learn. The mysterious Nintendo Switch Online test that begins later this month comes with a warning for people chosen to participate: Please don't disclose or discuss it at all.

It's not perfect, but it's got the best mix of previous games and is an instant family game pick-up for the holidays.

The series mostly kept up a basic standard of quality, although to diminishing returns, throughout the 2000s GameCube era, but by 2007’s Mario Party 8 for the Wii, the novelty had worn off. What followed was a decade of meandering culminating in 2018’s Super Mario Party for the Switch,