Games like project zomboid, zafehouse diaries and day-z.
Games I know about related to this: Project Zomboid, Dwarf fortress, Zafehouse Diaries, Day-z, Cataclysm: Dark days ahead, Don't starve, Left for dead 2, Left for dead, Harmfullgame, Lone survivor, Minecraft, Nether, NEO scavenger, How to survive, Rust, No more room in hell, Space pirates and zombies (SPAZ), Terraria, Zombie panic source, and the Half Life series. As you can tell, I love my zombie games. If you know any more, please tell me about them! I would be so greatful.
Free roam zombie survival game about building and scavenging?
james
Other that what you've mentioned
i strongly suggest die2nite… It is extremely fun but be patient with the game. The community is very very interesting
if you wanna play solo zombie pandemic is pretty good
there's also a bunch of other games
please check the source link… I update the list there regularly
hope i helped
Jack Fourquinn