I believe it would be a good idea to have radios and radio transmissions. At the beginning of the game there will be a number of radio transmissions. There will be news reports etc. Later on the radio station will be breached by the zombies. Before even the power shutsdown there won't be any more news reports. Most of the times the radio will just transmit noise. There will be a random chance for help message Someone calling for help through the radio. One drawback of the radios will be that they will make sounds and noises attracting zombies from the surrounding area.The other is they require power. Players will be able to build a transmisiion tower but however they won;t be able to use it without certain objects . This will help players get deeper in the game's atmosphere and also it will aid them find other survivors . Extra Suggestion : Give info to the player through Newspaper or even magazins Extra Suggestion 2 : Include TVs.