Board Thread:Warhammer 40k General Discussion/@comment-27642965-20160211003725/@comment-44249-20160301021513

Then you have Q, a being who talks casually about altering the gravitational constant and completely f*cks with the entire universe for his own amusement. But there's a saying in sci-fi debating circles (e.g. Star Destroyer.net) that if you have to invoke gods (or godlike aliens) to win, you're tacitly admitting that your chosen side can't win without a deus ex machina.

I once got into an interesting discussion of how the Imperium would stack up against the Yuuzhan Vong if you swapped them in for the tyranids. We concluded the Imperium would actually do pretty well:  the Inquisition is there to counter Vong spies and saboteurs, and while they do use combined arms to a degree (complete with organic analogues to AT-ATs), they have a tendency towards human(oid) wave tactics and have little in the way of man-portable ranged weaponry (limited mainly to thud bugs, which act like hand grenades).