User blog comment:Werewolfhell/Left 4 Dead Eleventy Blog 2/@comment-1155385-20091028175734

The end of the first world wasnt caused by an asteroid, it was caused by Chuck Norris failing to get the special achievment.

But anyway, no, it's not the Five Dog-like accomplishment, the only time you'll realise what you must do for this accomplishment is 4 years later when everyone ahs forgotten about it (Which might not happen, since i have DLC plans for new storylines in new climates)