Like that smell from the bins or that urge to look at your ex's holiday photos, zombies always come back.
Case in point: they've returned to plague the world of Call of Duty: Black Ops 3 in the latest slice of DLC, Eclipse.
We've employed the zombie-stomping skills of YouTuber MrRoflWaffles to give us the lowdown on the new content - with a video of what you can get stuck into and some tips on how to survive the latest onslaught from the undead.
"Zetsubou No Shima brings Treyarch's classic zombies experience to a treacherous island in the South Pacific. Thanks to the research of Division 9, the island is now host to a slew of newly-formed atrocities, all of which are intent on ensuring your demise. Here are some tips to keep you on your feet, no matter what mother nature might throw at you..."