Enter the codes on each wheel and then hit the button next to them to unseal the latches, letting the briefcase lid pop open. We can also confirm that the briefcase code is the same in every world ...

There's a locked briefcase players can find on top of the picnic table in Grounded 2 that they'll need a code to open, here's how to open it.

If you want to crack the Grounded 2 briefcase code, you need not one but two number combinations, so here’s where to find them all.

The second code is: Tap to Reveal You'll then be able to return to the briefcase on the picnic bench and open it by using the codes in their respective dials.