Apocalypse How — Class 0-5 happen due to rounding errors on tax forms or when an inquisitor
has to make sure.
This sounds pretty bad until you consider that: The Tau are going to
annex your world and ethnically cleanse you if you resist; the Eldar are
going to exterminate you if you touch one of their ancestral worlds,
not to mention they're making a new god for the
final battle with Chaos;
the Orks are going to make WAAAAGH! and burn the galaxy; the Necrons
are going to awaken and enslave everyone as cattle for their
soul-sucking gods; the Tyranids are going to arrive and consume the
galaxy; and Chaos cannot be denied and is going to turn the galaxy into a
fruedian nightmarescape. And that's only if the Emperor stays alive
long enough, because once he kicks it humanity will be stranded without
FTL travel and die slowly anyways. Enjoy your life.