I was browsing through the left4dead models when I noticed this Look familiar? It was off the boat from death toll So, what kind of weird little easter eggs do you love finding in valve games. From the lost reference in episode 2 (see here) to the not-so-subtle jokes in the left4dead posters, valve sure likes rewarding explorers. And of course, you've got valve's habit of porting stuff between games. Like that jarate is the boomer bile effect, and the chargin targe is the charger.