its actually now that the DLC came out it hanged lots of things. for instance it created 2 different communities, 1 for those without DLC and the other for peopel with DLC so u cant play with people in dlc unless you party with someone with dlc. that still wont really make u play with others with dlc but its only way to play with som 1 with dlc. O and the new gamemodes that came out probably have lots of people in it. infected is really popular