This, in the wise words of our editor, is “that silly Brit humor only you guys get.” It’s also part of Valve’s massive promotional campaign for Left 4 Dead 2. That should account for about £50 of the $25 million they had to spend then.

The first in what is presumably a multi-part series, Outbreak is laden with handy tips for surviving the inevitable Zombie apocalypse. Largely by fart-arsing with a garden strimmer, it seems. It’s all a bit sub-sub-Shaun of the Dead and Zombieland, to be honest, but when you’re following Valve’s long list of solid gold promo awesomosity, you’re always gonna be up against it.

Left 4 Dead 2 is out next month.