Idle Zombie Shelter is a free-to-play game developed by Iron Horse Games LLC for Android devices. The game is a simulation of a zombie apocalypse where you fight against waves of zombies to collect gold and resources. You can use these resources to build and upgrade your own shelter, which attracts more survivors to give you useful items and resources.

The game features a comprehensive skill system that offers many different options to upgrade your weapons and hire new soldiers to fight against the zombies. You can also compete with other players in the multiplayer rankings to be on top.

Idle Zombie Shelter is a thrilling game that offers endless hours of gameplay for zombie apocalypse enthusiasts. The graphics and sound effects are decent enough to keep the players engaged. Overall, it's a great game to play in your free time.