The brief

Two sides, Loyalist and Traitor, fighting over a planet across five rounds, with a running war tally, a war map that changes hands as tables are won, mission sheets per table, hobby voting between opponents after every game, and awards at the end for generalship, painting, lore and sportsmanship. Pairings had to keep sides apart, never repeat an opponent or a table, honour "rather not play" requests and a Zone Mortalis table everyone was promised a turn on.

What players got

• A link, not an app. Each player enters a four-digit number on their phone and sees their table, opponent and mission for the round.
• Profiles with a bio, faction heraldry and an uploaded army list, visible to everyone in the field.
• Results reported by both players and confirmed when they match, with disputes flagged to the organizers in red.
• The story, the war map and the tally, updating as rounds are published.

What the organizers got

• Swiss or random pairings generated per round with all the constraints applied, and the power to override any pairing, result, side or score.
• Printable number slips, pairing sheets and mission sheets for the paper fallback.
• Judge calls from tables, sealed standings until the awards ceremony, and tie-break picks when awards were level.
• Everything on its own site, with their logo, dates, venue, hotel block and sponsors.

Then other organizers asked for it

Warhost.App is that app made general: any game system with its own factions and theme, competitive and narrative formats, player registration and ticket sales, seasons for stores, and a site of your own live within minutes of ordering. Warzone Houston still runs on it. Click through the live demo to see the same thing with twenty fictional players, or run your own.