I've only seen one person so far in the game and I saved his life and we teamed up until a door crushed and killed him. I have been solo so far and I don't find the game to be hard. You must sneak around a lot though. Pro tip: Never use the Enfield to kill ANYTHING unless you know it is the only zombie in a mile :D
Hey brother, I started playing yesterday and I have a decent concept of play style from playing this and other games. I have a mic and would love to get some group play in. steam id is 4hrpr. Skype is Liberteer. I will be playing most of the day.