What is Unbefallen?

What if a historical turning point had gone differently? That is uchronia: alternate history. Unbefallen lets you enter the world that follows with other players.

Read the news, choose a faction, vote, and propose an action. At each deadline, the engine advances the world using the players’ choices. Then you face what happened next.

A finished campaign leaves a chronicle: the public dispatches of each epoch and how the world changed.

UNB, our model

UNB is Unbefallen’s in-house model. Its goal is to forecast real-world events as probabilities by measuring uchronia. UNB 0.1 is the current version: it is in development, and its forecasting performance has not yet been validated against real-world outcomes.

Beyond the uchronia

Across campaigns, players’ decisions and their simulated consequences form structured alternate-history trajectories. We aim to use only eligible contributions, meaning those permitted for that purpose, to train and evaluate UNB.