The line comes from Half-Life 2, Valve's 2004 first person shooter set in City 17, where background citizens share bleak small talk between encounters. One male citizen's remark about dreaming of cheese stood out for its mundane tone amid alien occupation. Players clipped and reshared it on forums and soundboards as a standalone oddity, alongside other Valve era voice lines like the bomb has been planted callout. It endures because the delivery is sincere, quotable and instantly recognisable to anyone who spent hours listening to NPC chatter.