Gameplay tactics
I love this game. Its a good tactic to focus on leveling just one character a lot at the beginning until you gain a good amount of levels on your buildings and have a good amount of food and water. Then focus on gaining survivors and leveling your main character the most. Your barrier defense gets better if you have more survivors and also gets better as you gain character and weapon levels. If your barrier hits zero you lose so dont wait too long to recruit and remember its also good to level it up with materials. You can use bottle caps to buy equip items like combat gear so its best to stock up considering you gain an extra health point per battle. Kill lots of zombies, get lots of parts and materials, and remember to have fun.