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 Legionnaires, Veterans, Sergeants, Calth Defence Force, and Apothecary to elite units of Terminators, a Legion Moritat 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.
- Original Horus Heresy Narrative: Set in the 31st Millennium on the planet of Calth, Magos Ohmnal Sarc joins forces with Sergeant Acastus and 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.
- 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.