For a few moments, me and my two teammates stood on the edge of a building in sheer awe as we watched a horde of Tyranids besiege a stronghold. Hundreds of monsters stream across a long bridge – darting past the flaming debris of destroyed Astra Militarum tanks. Red lasers from positioned snipers glaze across waves of Termagants, futile in their numbers.While this sounds like some sort of epic endgame cinematic, it’s not – this is just one of the many epic set pieces presented during one of the Operations Mission in Warhammer 40,000: Space Marine II. On the surface, these additional three-player PvE missions could feel like ‘extra’ content to indulge in outside of the main story campaign – but what you’ll actually find here is a series of compelling standalone challenges, class choices, and an impressive progression system that makes Operations Mode feel like an entirely different game grafted onto the campaign we expected.The team at Xbox Wire are all big Warhammer 40,000 fans, and wh…