watching a left 4 dead speedrun and thinking about my favorite steam achievement of all time

in l4d, you can play as a survivor or also play as a special infected

one of the types of infected you can play as is the Boomer, who can shoot poisonous bile at people

there is an achievement in the game called Outbreak

there are two ways to get it

the first is to be a Valve developer, all of whom start with it unlocked by default

the other way

is to get hit by a Boomer bile attack from a player who has the achievement

some days i forget how good left 4 dead's 4v4 versus mode was

the concept of an achievement that spreads like a virus is just so cool

left 4 dead's versus mode is so fun