Well I must say the game is very good, very entertaining and fun, it's good you begin to play with friends and do many things and have fun.
It will describe the cooperative mode: Scout mission, Normal mode and heroic mode horde horde. are 3 types of gameplay are the scout mission that just play for beginners.
The normal mode is already something heroic niveleado represents more challenge and difficulty level rises, as shown boss and hoarders.
And the heroic horde is already a more difficult for players and veterans, it represents very challenging and every sub-boss has more life and cause more damage like the hoarders and the final boss.
This co-op is fun and very entertaining only 3 worlds which makes it too repetitive when you play a lot, spent a while you get bored and the same thing .. nothing is motivating and you know that already do, in my opinion I think they should add more things and more worlds.
Multiplayer (Scavenger) are 12 players making it be more fun, there is much competition and should pick up supplies, also has 3 worlds like the horde mode, in my opinion does not bore me because the multiplayer mode by entering in game you get with different people and different mode to play and have fun with your team.
Thus ruining the game more and more are the cheaters, and the scavenger does not become fun because of these subjects, and take away the spirits of play .. not serious as fair game, hack people who need to win and because of that do not let others have fun :(
Over time many people stop playing dead island epidemic waiting time to play scavenger lasts almost 20 minutes. What I do like is that they add more things to the game, new challenges, new worlds and etc. After doing this analysis if the game does not give my 'positive' or my 'negative' but hey I'll give my 'Positive' for the sole fact that the multiplayer is fun. My final grade is 5/10.