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The Horus Heresy: Betrayal at Calth

Steam Video Games Windows


Here are the requirements for VR players on the HTC Vive or Oculus Touch:


OS: Windows 8
Processor: Intel i5-4590 or greater / AMD FX 8350 or greater
Memory: 9 GB RAM
Graphics: NVIDIA GeForce GTX 970 / AMD R9 390
DirectX: Version 11
Storage: 30 GB available space


Graphics: NVIDIA GeForce GTX 980 / AMD R9 390X
DirectX: Version 11
Storage: 40 GB available space

About the Game

Immerse yourself in the Horus Heresy the epic origin story
of the Warhammer 40,000 Universe!

The first shots have been fired in the conflict that will change the future of mankind. Brother Legions of Space Marines taking arms against one another. The noble Ultramarines are betrayed on Calth by the zealous Word Bearers bent on tearing down the Imperium. A dark ritual ignites the system’s star, sending both Legions underground to battle for their honor, their belief, the fate of the Imperium, or just to survive.

The Horus Heresy: Betrayal at Calth is a game of turn-based skirmishes between the genetically altered warriors of the 31st Millennium, The Adeptus Astartes. In the campaign, players control units of Space Marine Legionnaires, guiding them through the underground arcologies of Calth. Fight alongside units of Ultramarines ranging from basic Legionnaires, Veterans, and Sergeants, to elite units of Terminators, and the most venerable Contemptor Dreadnought. Dispatch the foul heretics of the Word Bearers using a mighty arsenal, from the ranged accuracy of Bolters, Plasma Guns, Flamers, and Rocket Launchers, to the close combat might of Chainswords, Power Fists, and Lightning Claws.

The Horus Heresy: Betrayal at Calth also includes several Multiplayer maps allowing players to fight as Ultramarines or Word Bearers in either objective based missions or deathmatch. Bring the full arsenal of your chosen Legion to bear against friends with private matches or against opponents across the world with built in matchmaking. Multiplayer mode is available to both PC and VR players, allowing both formats to play against one another.


  • Original Horus Heresy Narrative: Set in the 31st Millennium on the planet of Calth, Magos Ohmnal Sarc commands a unit of Ultramarines. When he discovers corrupted data in the data stream, Sarc is confronted with a faction of aggressive Word Bearers and a devastating plot of corruption within the Imperium that introduces untold threats and schemes against the Emperor. The original story was written by Black Library author Rob Sanders.
  • A Living Battlefield: While players decide on their next action or wait on their opponent, the world around them continues to animate and fight.
  • Multiplayer Skirmish Mode: Players can choose between the Ultramarines and Word Bearers factions. Units include Legionaries, Veteran Legionaries, Sergeants and a cast of characters armed with everything from bolters to melta guns to assault cannons. More character classes will be added up until the final game release.
  • Cross-Platform Multiplayer Matchmaking: Play on either gaming PC, HTC Vive or Oculus Touch. As a turn-based game, PC verses VR provides no gameplay advantages, only differing user experiences of the world.

Play In VR

  • VR Mode: The “human-scale” view of Space Marine combat gives the player the feeling of being on the battlefield in a world first VR game set in the Warhammer 40,000 universe.

Coming During Early Access

  • Single-Player Campaign: 24 combat scenarios exploring the conflict between two factions of Space Marines, divided into 5 Acts. The story progresses linearly and each level presents unique challenges intertwined with the drama of the narrative.
  • More Unit Types: Terminators, Dreadnoughts and new unit abilities.
  • Single Player Skirmish verse AI: Skirmish against the AI on multi-player maps.
  • More Multiplayer Maps: As each new story act is released new multi-player maps will be released as well.
  • Legionaire Customization: Customize your Ultramarines and Word Bearers with armor and equipment swaps.
  • Maybe a few surprises!

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The Horus Heresy: Betrayal at Calth

The Horus Heresy: Betrayal at Calth is a tactical-turn-based skirmish VR game. Based on Games Workshop’s fan-favorite Betrayal at Calth board game, set during the origin era of 40k. Play cross-platform on PC and take command of the Ultramarines as they battle against their traitorous brethren, the Word Bearers.

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