Boarding Actions are the new game format for 40k. For those looking to give them a try and want to get a ready-to-play army for one, you can check out the new Boarding Patrol box sets that are coming soon. They’ve got Tyranids, Grey Knights, and Necrons on the way.
From the article:
Boarding Actions are an exciting new way to play Warhammer 40,000, introduced in Arks of Omen: Abaddon – smaller forces clashing at close-quarters within immense voidships. We’re all mad for this new game mode – from Warhammer Community campaigns to stories, scenarios, and a battle report in White Dwarf 485 – and things are only going to heat up now that Arks of Omen: Angron has arrived, bringing extra faction rules, new missions, and additional terrain to explore.