Army list builder for Horus Heresy 3rd Edition. You pick the units, and Warhost deals with the force org.
Pick your Legion, choose Loyalist or Traitor, then add the units you want to field. Warhost works out a legal detachment layout and shows where each unit sits. When two layouts are equally valid, it shows you the choice and you pick.
Lists save on your device, no account needed. To get them on more than one device, sign in with your email. Warhost sends a one-time link that expires after 15 minutes. There are no passwords.
Once a list is done, you can copy it as plain text or in a format for pasting into chat, or share it as a link anyone can open, signed in or not. Print it or save a PDF as a roster, a quick reference, or a full version with a glossary. You can also back up all your saved lists to a file and restore them later, and import .ros and .rosz roster files from other list builders.
Unit and detachment data comes from the community BSData repository, so if that data is out of date, Warhost is too.
Warhost is free and has no ads. I'm one person making it as a hobby. Your lists stay in your browser unless you sign in or make a share link, and you can delete your account and everything saved to it from inside the app. The full privacy policy is at warhost.net/privacy.
Warhost is a fan-made tool and is not affiliated with, endorsed by, or sponsored by Games Workshop. Horus Heresy and related names are trademarks of their owners.
Pick your Horus Heresy units. Warhost fits them into legal detachments.