>one day, out of nowhere, alien spores drop all over Earth
>the spores grow into a mutagenic fungal organism that covers the majority of the planet
>90%+ of the human race is dead or mutated into monsters within a month
>the aliens aren't even trying to invade, they're not any kind of army or insurgent group, they're some weirdo religious cult trying to turn Earth into a single organism
>this is the only reason why the survivors can fight back against the "invaders"; they're barely competent lunatics
>the bad ending is the canon ending, the aliens agree to resettle what's left of humanity on Mars just so they'll stop fucking around with their "grow a giant alien super-brain" plan