Well but seriously, have you tried the game on PC, and then entered the infected zone? (the zone in the city that is cowered with white walls with biochemical signs).
This game is really fun to play with friends in COOP mode. Last time I've spent so much time playing zombie game was in PSX times with Resident Evil series. I played it for hours already and I have only 38% completed so I guess it's pretty long, I wasn't even expecting there will be another location (city).
It's a really good game if you ignore all the bugs and flaws.
I also have no money but this doesn't stop me from playing online in COOP mode.
The map is huuuuge. At first I thought that size of resort area is decent. But then city area was available. Now I'm at jungle area (~60% of storyline or smth) and it is about 2 times bigger than city, maybe even more.
Damn! I am around 60% now, and have just returned from city to beach. Guess the jungle act will start very soon. And if I have understood right, there even is a 4th location after the jungle part O_o