Eagle-Gryphon Games
On Mars: Alien Invasion Expansion Board Game
On Mars: Alien Invasion Expansion Board Game
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About this product
Defend the Red Planet from alien threats with cooperative, solo, and one-versus-many story chapters.
A story-driven On Mars expansion for experienced players who want new modes, tougher challenges, and a dramatic sci-fi twist.
On Mars: Alien Invasion expands the base game with a story-led sci-fi challenge where Mars is no longer only about building a colony. Across four different chapters, players face alien threats, defend the settlement, manage new crisis systems, and explore cooperative, solo, and one-versus-many ways to play.
Product Description
On Mars: Alien Invasion expands the original On Mars board game with a tense story campaign across four different chapters. Players may defend Mars together, face an Alien Commander, survive outbreaks and sabotage, or take on a configurable solo challenge.
Why you’ll love it
- Adds four story chapters that each change how On Mars plays.
- Includes different play modes: one-versus-many, cooperative, and solo.
- Fresh alien threat system with alien troopers, alien buildings, alien tech, and new defensive tools.
- New human defence options including Sentry Bots, the Defense Exosuit, Shields, Sabotage, Medicine, Hospitals, and more.
- More replay value for On Mars fans who want new challenges beyond the base game.
- Story by Nathan Morse adds a sci-fi narrative layer to the heavy strategy gameplay.
- Designed by Vital Lacerda with artwork by Ian O’Toole, making it a strong add-on for serious strategy gamers and On Mars collectors.
- Includes the Beacon promo card for use with the base game.
Quick Details
- Product type: Board game expansion
- Base game required: Yes, requires On Mars
- Players: 1–5 depending on chapter
- Recommended age: Use On Mars base game age guidance
- Difficulty: Medium-Hard / Hard
- Theme: Mars colonisation, alien invasion, survival, cooperation, sci-fi defence
- Game style: Heavy strategy expansion / cooperative and scenario-based gameplay
- Designer: Vital Lacerda
- Story: Nathan Morse
- Artwork: Ian O’Toole
- Expansion available: This is an expansion for On Mars
Good to Know
- On Mars: Alien Invasion is an expansion and requires the On Mars base game to play. Start with On Mars to build the colony, learn the orbit-and-surface action system, and develop the life-support network before adding the alien invasion chapters.
- This is not a standalone board game.
- The expansion is divided into four chapters, and each chapter changes the game experience in a different way.
- Chapters can be played in story order, but the scenario book also says they can be played in any order if preferred.
- Chapter 1: Invasion is a one-versus-many mode where one player controls the Alien Commander against the human team.
- Chapter 2: Outbreak is a cooperative chapter where players work together to control a dangerous colony-wide crisis.
- Chapter 3: Blackout is a cooperative chapter about alien sabotage and keeping key buildings running.
- Chapter 4: Monolith is a solo chapter with configurable difficulty.
- Most chapters are cooperative, so the group can lose together if the chapter goal is not achieved.
- Best for players who already know On Mars and want more challenge, more story, and new ways to play.
Care & Maintenance
Store alien meeples, tokens, cards, boards, and scenario components neatly after play.
Keep each chapter’s components grouped separately where possible so setup stays easier next time.