I do feel comfortable saying that it is more than a demo just with the extra missions. They are stuff you wouldn't normally see in a demo, I think. The main story mission feels exactly like a demo, right down to getting a trailer for The Phantom Pain after the final credits. It's a heck of a lot of fun for what it is, but it's not worth the asking price of $30 on PS4. I know you can get it for $20 as a digital download on PS3/360, but that's still pretty high for what it is.