Apocalypse of Umbral Void: The Battle of the Hive from Hell
The marine/tau army featured Tau fire support with tanks and four Riptides in the back. The guard brought four Leman Russ tanks in the back. The marine contingent was several three man squads of grav armed bikers, melta armed Land Speeders and I think five? Drop podding dual-melta contempt or dreads. Also appearing was a land raider packed with 20 marines led by the dreaded primarch of the Emperors Children. Additionally, their team fielded an immobilized bane blade as a campaign bonus. The Necron/Ork/Mechanicum force was much more eclectic. Each general brought a Superheavy to the table just for the heck of it, so Ghazhkull's personal bane blade (containing of course a mob of Meganobz and the Big Boss Himself) and a Necron Transcendant C'tan. Beyond that it was a mess of transports, tanks, infantry and bikers.