2018Gavan Brown, Matt Tolman, Martin Wallace
- Videos
- 112
- Creators
- 88
2 - 4 players60 - 120 minHeavy weight

2026Martin Wallace
Some how-to-play. Casus Belli is covered on BoardGameVideo.com by 1 reviews, 2 how-to-play guides, 1 recorded sessions, and 3 other videos.
From BoardGameGeek
Casus Belli is a game of exploration, settlement, and warfare in space. Over a thousand years ago, humanity spread to the stars, creating a massive empire. This empire grew too big and split into four main factions, a period now known as the 'Great Split', which then led to a time of war. Conflict led to an era of darkness for humanity. Now after many years, the four faction have started to expand again. How they act is determined by by their prevailing ideology, who knows if this will lead to a new war. Each faction will explore and colonize the systems in the region. In doing so, they will come across ancient alien technologies. However, some of these technologies will lead to corruption. The game starts in a period of peace. Some actions may lead to an increase in tension, which in turn may lead to war. While peace reigns, factions cannot fight each other...unless they have a casus belli. Once war breaks out, the factions will divide into alliances and major battles can occur. The game plays over seven to nine rounds, and at game's end, each faction scores differently for assets they have on the board. -description from the publisher
Casus Belli has 7 videos from 4 creators: 1 review, 2 how-to-play guides, 1 playthrough and 3 other videos. They date from March to May 2025.
To learn the rules, start with "Casus Belli - Learn While Playing" by Getting Games, which runs 1 h 23 min.
For an opinion before you buy, start with "A Few Handfuls of Space | Casus Belli First Impressions, Overview, Game Comparisons" by The Board Gaming Doctor. To see it played, watch "2P Casus Belli Playthrough with Martin Wallace and Cassie Simpson" by Wallace Designs.
If you like it, try Brass: Birmingham, Anno 1800: The Board Game, AuZtralia and Age of Steam, also by Martin Wallace.
2018Gavan Brown, Matt Tolman, Martin Wallace
2 - 4 players60 - 120 minHeavy weight
2020Martin Wallace
2 - 4 players120 minHeavy weight
2018Martin Wallace
1 - 4 players30 - 120 minMedium weight
2002John Bohrer, Martin Wallace
1 - 6 players120 minHeavy weight
From BoardGameGeek:
Casus Belli is a game of exploration, settlement, and warfare in space. Over a thousand years ago, humanity spread to the stars, creating a massive empire. This empire grew too big and split into four main factions, a period now known as the 'Great Split', which then led to a time of war. Conflict led to an era of darkness for humanity. Now after many years, the four faction have started to expand again. How they act is determined by by their prevailing ideology, who knows if this will lead to a new war. Each faction will explore and colonize the systems in the region. In doing so, they will come across ancient alien technologies. However, some of these technologies will lead to corruption. The game starts in a period of peace. Some actions may lead to an increase in tension, which in turn may lead to war. While peace reigns, factions cannot fight each other...unless they have a casus belli. Once war breaks out, the factions will divide into alliances and major battles can occur. The game plays over seven to nine rounds, and at game's end, each faction scores differently for assets they have on the board. -description from the publisher
Designer
Martin Wallace
Artists
Rupert Lewis Jones, Lucas Lacerda
Publisher
Wallace Designs
Categories
Mechanics