Here's a stage show of the beta demo they had at E3
the TL;DR if you don't want to watch it.
- Greater emphasis on melee combat
- Individual characters have different special skills
- You have a camp that you upgrade with items you find on missions and also seems like some items you find you can craft items like lockpicks and such (for characters that use those skills)
- There is a noise meter so hordes aren't just triggered by a witch (like in L4D)
- There are humans, not everyone is a zombie.
- There is character progression, skill trees, etc
- Expect a lot of post launch content (like payday 2)
Here's just straight gameplay of the beta mission (no interview)