Ultima Ratio Regis.

Ultima Ratio Regis, the definitive strategy game of the modern age.

Ultima Ratio Regis (uRR) is a game for 1-8 players that recreates the military history of the European modern age. The game begins with the discovery of America and ends with the beginnings of the French Revolution.

It spans 20 turns over 15 years, lasting between two and four hours per turn. The game is organized into scenarios for several of these turns. In Ultima Ratio Regis, players will lead the different powers that disputed world hegemony during the 16th to 18th centuries.

In the designer notes, you can see the reason for many design decisions, and you can go a little deeper into this game.

The first release included an introductory scenario for one player (“The Rise of Portugal”) and a couple of scenarios focused on the first half of the 16th century (game turns 1 to 5): “New Order” and “Italian Wars”. In the second release, we added three new scenarios, including the French Wars of Religion, turns 6 to 8.

The third release (version 2.0) slightly modified some of the rules of the game. It added a couple of new scenarios (Wars of Religion and the 30-Year War) and improved the graphic design.

This fourth release (version 3.0) closes the game, adding the missing turns and the last scenarios to cover the 300 years of the game. It is now possible, for example, to start the game in 1480 and finish it in 1790 by playing the “Great Campaign” scenario.

This version 3.0, compared to version 2.0, has implemented the following rule changes:

  • The most important has been that of trade. This part is the one that has changed significantly compared to the previous one. The changes simplify the players’ decision-making and represent much better the historical dynamics (although in a somewhat abstract way).

  • There have been minor changes to simplify some rules that did not add much.

  • An effort has been made to rewrite other rules to improve didactics and accuracy.

  • We have also tried to simplify historical events and power cards without losing realism.

  • Some special rules affecting some turns have appeared to add more realism.

Regarding the rest of the elements, there have been minor changes in the map and in the cards supplied in the previous version. Obviously, we also have many new events, powers and minors to cover all the remaining turns until the end of the period.

In this latest release, we have also significantly improved the graphic design. Not only the aesthetic aspects, but also those that improve the immersion in the game and help the player to quickly identify the information in the game.

Miniature of the game Ultima Rario Regis

Download the rules here

Game documents

Rest of elements


The instructions to do it yourself are here.

In the BGG forum, you can consult and ask for help for doubts about the rules.

Below, you can download the VASSAL module