If you are going to make another Rebuild, I have some ideas. 1. Add another group trying to rebuild as you are, possibly add a choice to join them or fight them. Just to make the game easier or more challenging. 2. Add couple new buildings. 3. Possibly make the map a bit bigger. 4. Maybe add some more events such as zombies are in the base or Natural disasters. There are some ideas in case you do make a third one.
Its a good Game I didnt know I was finished when i gathered everything and found the boat. So used to games that explode and say CONGRATES YOU WON. It needs (in my opion) more complex mazes and items to gather. Also put in a shark or something that does damage to you which causes you to lose Oxygen faster.
I love this game series. But when (if) they come Im going to be in Antartica. (reasons why) its cold they will freeze to death. Its far away from population zones. Plenty of animals. Plus its HUGE.
I say its a great game but I think the people need weapons, there should be more defenses you can build, and the zombies have should have different types. Its still a great game thumbs-up :)