In regards to Left 4 Dead 3, we now understand that Emily Ridgway, Valve's new musical composer, is working along fan favourite Valve composers Mike Morasky (Team Fortress 2, Portal 2) to create an original soundtrack for the upcoming game. Composer Kelly Bailey (Half-Life, Half-Life 2) previously left Valve a number of years ago, but has since returned to the company as he is currently listed on a number of projects, including both Left 4 Dead 3 and Half-Life 3. Whether or not Kelly is actually working on the soundtrack for Left 4 Dead 3 remains to be seen.