
- BGG rank
- BGG #660
- BGG rating
- 7.6
Labyrinth: The War on Terror, 2001 – ?
- 1–2 players
- 180 min
- Complexity 3.7/5
- 2010

2023
Rules assistance for ONUS!: Traianus
Plain-language explanations of turns, card effects and disputed situations, with official source references and saved question history.
For 1 player

What would you like to know?
Answers come from the official rulebook, with the page to check.
ONUS!: Traianus is a board game released in 2023 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.
Have you ever dreamed of commanding a powerful army? Have you enjoyed a good historical novel about Ancient Rome and you would have liked to move to this period in the middle of battle? Would you like to be able to change History or revive exciting historical events? If you have answered affirmatively to any of these questions then this is your game. ONUS! Traianus is a historical battles wargame, similar to a miniatures game, where two sides confront each other in an Ancient battle. This game is focused on the armies of the great superpowers of the apogee of the Roman Empire, during the reign of the emperors Trajan and Hadrian, between the 1st and 2nd centuries AD. In this game, different action cards recreate varied kinds of orders and battle events, that allow every match to be unique and to any combat to be epic, unpredictable and exciting. ONUS! can be played anywhere but to get the best gaming experience we do recommend a game area as large as possible, i.e. 3.2 x 2.9 feet (100 x 90 cm). Units are represented by cards which have been scaled around a Centuria (also known as Century) or to a Maniple (also known as Manipulus), representing formations from 80 to 100 men for Infantry units, 20 cavalrymen for Cavalry units or 6 Elephants. Units have their own set of traits to represent permanent attributes of the unit, like Melee Combat, Range Attack, Defensive capacity, Morale and Life, and Movement capacity. This set of traits gets bonuses and penalties depending on the ongoing situation and combat engagements. Units also have their unique set of skills to represent specific abilities they can perform: from defensive formations to extremely effective techniques to attack enemies. Some of these skills need to be activated; meaning only one of them can be used in an engagement, while others are inherent to the units. Leadership is represented in the game by the figure of the General. A General’s token represent his HQ and its own escort. In addition to the leadership benefit, a General grants bonuses to nearby units, boosting the morale of the troops and providing additional benefits when they are engaged with the enemy in those bloody encounters. —description from the publisher
ONUS!: Traianus 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!: Traianus 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!: Traianus 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!: Traianus has a complexity rating of 2.9 out of 5 from BoardGameGeek players, which makes it a medium-light 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!: Traianus belongs to these categories: Wargame and Ancient. 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!: Traianus 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!: Traianus as a base game. It can be played on its own with the components in the box and does not require any other title. Expansions, if any exist, add new content or rules on top of it and are listed separately in the catalogue with a link back to this base game.