Graffiti

Graffiti is found all over the four campaigns of Left 4 Dead, most commonly so within the safe houses. The graffiti is left by survivors who had been through the area, generally messages for loved ones, to other survivors, or simple comments, such is the case with the infamous Chicago Ted.

The Apartments

 * “No Cure”
 * “None of you will survive”
 * “Rosa is saying Fairfield has been quarantine”
 * “Entire city is gone-if you can read this, leave”
 * “Keith, waited 3 days at the meeting spot after we got separated. I can’t wait anymore. Meet me at Mercy Hospital” – Krista

The Subway

 * “Nobody is going to save us”
 * “HEATHER Ignore the plan, airport is quarantined-Meet me at Moms”-Rick
 * “They can talk”
 * “To Helen Lane Dad and Me Love you and we are alrite”- Will
 * “Andrew Hale, Danny and I love you”
 * "They are going to bomb the city. If you can read this, GET OUT!!!"

Rooftop Finale

 * “NO ZOMBIE IS SAFE FROM CHICAGO TED”

Notable Instances

 * "Better safe than sorry." (Found in The Church.)
 * "I miss the internet." (Comment below an argument in Dead Air, the Terminal Safe House.)
 * "GOD IS DEAD" (Found throughout Dead Air)

Trivia

 * Many of the dates of death used to say "-Person- May 2008". When 2009 arrived, the death dates changed from 2008 to 2009.