I was checking out Open Broadcaster Software and created a gameplay video. You can see two players shooting down some bogies over 2 minutes. This is how the campaign or survival modes would work. All current weapon types are shown, but only one enemy type. This video is also without sound, but there will be more to follow. By the way, the game has a friendly fire setting for those who like to get into arguments with whoever they are sitting next to playing.
Head to the video over at Media