'It’s your funeral’, reads the tag line to The Sacrifice, Valve’s latest DLC for Left 4 Dead 2. Ironically this particular installment is about resurrection. The original survivors from Left 4 Dead take centre stage. Immediately it’s evident just how sorely missed they are. The opening banter – which changes frequently – provides more humour and wit than their successors could ever muster. The chemistry between Francis, Bill, Zoey and Louis was always going to be a tough act to follow.