Infestation: Survivor Stories is described as '(formerly known as The War Z) is an open world zombie survival game where players endure the hardships of a post-apocalyptic, zombie-infested world'. There are six games similar to Infestation: Survivor Stories for a variety of platforms, including Windows, Steam, Mac, Linux and Online / Web-based. The best alternative is Metro Game Series. It's not free, so if you're looking for a free alternative, you could try DeadZ. Other Infestation: Survivor Stories like games are DayZ (Paid), 7 Days to Die (Paid), Project Zomboid (Paid) and Dead State (Paid).
Metro 2033 is a survival horror first-person shooter video game, based on the novel Metro 2033 by Russian author Dmitry Glukhovsky. Metro 2033 was developed by 4A Games in Ukraine, and was released on Microsoft Windows and Xbox 360 in March 2010.
The post-soviet country of Chernarus is struck by an unknown virus, turning the majority population into frenzied infected. Fighting over resources has bred a hostile mentality among survivors, driving what’s left of humanity to collapse.
In the year 2034 nuclear attacks have decimated the Earth and the remaining population is infected by an unknown virus. The infected die within 7 days and soon reanimate becoming blood-thirsty zombies. No one believed it; nobody expected it and nothing can stop it!
Project Zomboid is a Zombie Survival RPG. Here are some of its planned features: Retro-isometric style with plenty of zombie insides thrown in for good measure. A massive city and the surrounding areas to traverse, explore and loot.