Eldritch Earth: Five Hacks Deep

When a crossroads, plot point, discovery or choice happens in a GMless game someone (either first person to pipe up or someone chosen at random) suggests an outcome or result. The rest of the table then agrees on the likelihood of the outcome expressed as a number at which or higher on a d12 the outcome seems likely. A d12 is rolled.

If a 12 is rolled, the event is wildly true to an unexpected degree.

If a 1 is rolled, the exact opposite of the outcome occurs.