City Outpost 4.9 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. This free program was originally developed by Falco Software Company. The program lies within Games, more precisely Action. We recommend checking the downloaded files with any free antivirus.
From the developer:
Within a couple hours, most people turned into zombies. What happened? Was it a human-developed virus? Or did a virus appeared from a meteorite that has crashed near the city that no one knows about. But you need to do something and it shall be done. The city was quickly divided into sectors and these sectors are surrounded by walls. You, the only one alive, are not yet a zombie. So grab a weapon and destroy them.
You may want to check out more software, such as Cash And The City, Outpost Firewall Pro or OutPosted, which might be related to City Outpost.