
- BGG rank
- BGG #5,489
- BGG rating
- 8.4
ONUS!: Traianus
- 1–4 players
- 30–120 min
- Complexity 2.9/5
- 2023

Rules assistance for ONUS! Triumviratus
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

What would you like to know?
Answers come from the official rulebook, with the page to check.
ONUS! Triumviratus is an expansion for ONUS! Rome Vs Carthage released in 2025 for 1–4 players, 30–120 minutes per game, and ages 12 and up. It was designed by Luis Álvaro Hernández and its main mechanics are Dice Rolling, Simulation, and Events.
Triumviratus is an expansion of the ONUS! series that gives you the opportunity to take command of the armies of Gaius Iulius Caesar, Gnaeus Pompeius Magnus, Marcus Licinius Crassus, and the civitates of Gaul, as well as an extensive selection of entirely new allied and mercenary forces, to immerse yourself directly in the armed conflicts that changed the course of the history of Rome, Europe and the Middle East between 59 and 44 BC. A complete volume in the form of a new Compendium that, apart from offering a historical overview of this exciting period and all the art created exclusively for this expansion, will also offer an impressive variety of scenarios with which to recreate the numerous battles and sieges that marked the Gallic War, Crassus’ campaign in the East or the Civil War between Caesar and Pompeius, in order to get the best out of these army boxes. Thus, from the battle of Bibracte (58 BC), through the ambush of the Sabis River (57 BC), the battle of Carrhae (53 BC), the difficult siege of Alesia (52 BC), the battles of Dyrrachium (49 BC) and Pharsalus (48 BC), to the final outcome of the battle of Dyrrachium (49 BC) and Pharsalus (48 BC). ), to the final culmination of Munda (45 BC), we will soon be able to present a complete selection of campaigns and scenarios through which to travel the winding paths and dusty battlefields of the years 59-44 BC, to relive History… or change it decisively and forever, through the powerful armies that enter the fray at the hands of ONUS! Triumviratus. —description from the publisher Triumviratus es una expansión flexible de la serie ONUS! que te ofrece la oportunidad de tomar el mando de los ejércitos de Gayo Julio César, Gneo Pompeyo Magno, Marco Licinio Craso y las civitates de la Galia, así como de una extensa selección de fuerzas aliadas y mercenarias completamente nuevas, para sumergirte directamente en los conflictos armados que cambiaron el curso de la historia de Roma, Europa y el Próximo Oriente entre los años 59 y 44 a.C. Un completo volumen en forma de nuevo Compendium que, aparte de ofrecer un recorrido histórico sobre este apasionante periodo y todo el arte creado exclusivamente para esta expansión, ofrecerá así mismo una impresionante variedad de escenarios con los que poder recrear las numerosas batallas y asedios que jalonaron la Guerra de las Galias, la campaña de Craso en Oriente o la Guerra Civil entre César y Pompeyo, a fin de poder sacarle el mejor partido a estas cajitas de ejército. Así, desde la batalla de Bibracte (58 a.C.), pasando por la emboscada del río Sabis (57 a.C.), la batalla de Carrhae (53 a.C.), el difícil asedio de Alesia (52 a.C.), las batallas de Dyrrachium (49 a.C.) y Pharsalus (48 a.C.), hasta el desenlace final de Munda (45 a.C.), próximamente podremos presentar una completa selección de campañas y escenarios a través de los cuales recorrer las tortuosas sendas y polvorientos campos de batalla de los años 59-44 a.C., para revivir la Historia… o cambiarla de forma decisiva y para siempre, mediante los poderosos ejércitos que entran en liza de la manos de ONUS! Triumviratus. —description from the publisher (Spanish)
ONUS! Triumviratus supports 1–4 players according to the catalogue. This range comes from the publisher’s listed player count, so the game can be set up for any group size within it. Some setups, rules and scoring details may still vary by player count, so check your edition’s rulebook for the exact configuration.
The listed playing time for ONUS! Triumviratus is 30–120 minutes. This is the publisher’s estimate for a full game. The actual duration depends on the group, the player count and familiarity with the rules: first sessions usually run longer, while experienced groups often finish faster. Setup and teaching time are not included in this estimate.
The catalogue lists ONUS! Triumviratus for ages 12 and up. This is the publisher’s recommendation and reflects reading demands, rule complexity and small components rather than theme alone. Younger players can often join with help from an adult, so check the age guidance on your edition and consider your group’s experience with board games.
ONUS! Triumviratus has a complexity rating of 3.0 out of 5 from BoardGameGeek players, which makes it a medium-weight game. The rating reflects how much rules knowledge, planning and decision-making a typical game demands. Expect a longer first teach for heavier games, and use a preparation guide before game night.
ONUS! Triumviratus belongs to these categories: Wargame, Ancient, and Expansion for Base-game. Its main mechanics are Dice Rolling, Simulation, and Events. Categories describe the theme and setting of a game, while mechanics describe what players actually do on their turns. Each mechanic links to a catalogue hub with similar games, which helps when you want something comparable.
The credited designers of ONUS! Triumviratus are: Luis Álvaro Hernández. These credits come from the published game data and name the people responsible for the game’s design, not its illustrators or publishers. Designer pages on MeepleRules collect other titles by the same designers, which helps when you enjoy a game and want to find similar ones.
The catalogue lists ONUS! Triumviratus as an expansion for ONUS! Rome Vs Carthage. Expansions add new content, rules or scenarios to the base game and usually cannot be played on their own, so you need ONUS! Rome Vs Carthage to use it. Check that your edition of ONUS! Rome Vs Carthage is compatible, as some expansions were revised between editions.