
- 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! Army box XVII: Crassus
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.

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Answers come from the official rulebook, with the page to check.
ONUS! Army box XVII: Crassus is an expansion for ONUS! Rome Vs Carthage released in 2025 for 1–4 players, 30–120 minutes per game, and ages 21 and up. It was designed by Luis Álvaro Hernández and its main mechanics are Dice Rolling, Simulation, and Events.
Crassus’ army box leads the player to take up the banners of the legions that the “richest man in Rome” formed to fulfill his dream of conquering the opulent Parthian Empire. He is accompanied by his son, Crassus Iunior, a skilled and courageous general, who had been trained in Caesar’s first campaigns in Gaul. His archenemy, Surena, responsible for his defeat and death at Carrhae, shares a box with both of them, ready to put his genius at the service of the Parthian armies. Crassus’ legions do not know what is coming, but with the help of the fearless vigiles and numerous eastern mercenaries, such as the Galatian legionaries and the Rhodian slingers, they may be able to defeat fate and change the history of the world. If not, the survivors of Carrhae can always make a name for themselves in the service of the armies of the distant Han Empire, beyond the other end of the Orb known to the Romans. —description from the publisher La caja de ejército de Craso lleva al jugador a tomar los estandartes de las legiones que el “hombre más rico de Roma” formó para cumplir su sueño de conquistar el opulento Imperio parto. Le acompaña su hijo, Craso el Joven, diestro y valeroso general, curtido en las primeras campañas de César en la Galia. Comparte caja con ambos su archienemigo, Surena, responsable de su derrota y muerte en Carrhae, listo para poner su genio al servicio de los ejércitos partos. Las legiones de Craso no saben lo que se les viene encima, pero con la ayuda de los arrojados vigiles y numerosos mercenarios orientales, como los legionarios gálatas y los honderos rodios, puede que sean capaces de vencer al destino y cambiar la historia del mundo. Si no, los supervivientes de Carrhae siempre podrán labrarse un nombre al servicio de los ejércitos del lejano Imperio Han, más allá del otro extremo del Orbe conocido por los romanos. —description from the publisher (Spanish)
ONUS! Army box XVII: Crassus 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! Army box XVII: Crassus 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! Army box XVII: Crassus for ages 21 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! Army box XVII: Crassus 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! Army box XVII: Crassus 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! Army box XVII: Crassus 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.