Add the game Zombieland, it's small but playable. I'm the author.

[andreamonaco]

As the title says. This is the repository https://github.com/andreamonaco/zombieland
The code is GPL3+ and the art is free too.
At present it's small but it is playable; if you set up a server multiple player can walk in a map, shoot at each other and at zombies, they must also drink and eat to survive.
I'm the author and I can provide further info