Games like Zombie Siege City

"Zombo Buster Rising" is a tower defense game where players must defend against hordes of zombies. Players can build towers and deploy special units to fend off the undead, earning upgrades and new weapons along the way. With a variety of levels and enemies, it offers a challenging and humorous take on the genre.

"Earthfall is a Science Fiction Shooter game with single-player and multiplayer co-op modes for up to 4 players. Battle an extraterrestrial invasion in the Pacific Northwest using futuristic weaponry and deployable barricades. Experience tense, procedurally generated gameplay and a well-crafted story across 15 levels."

In "Blood and Zombies," players take part in a thrilling fight for survival against hordes of zombies in this first-person shooter and tower defense hybrid. Choose one of four heroes, build up your fortress, and deploy various defensive structures to protect humanity's last stand. With each victory, upgrade your base and weapons to face even greater challenges in this post-apocalyptic world.

"Guns n Zombies" is a thrilling post-apocalyptic game where you fight against hordes of robotized zombies infected by a nano-virus. With a variety of weapons, special abilities, and turrets, you'll embark on a dangerous journey through a randomly generated gameplay. The survival mode allows you to challenge yourself and compete with other Steam players, all while experiencing a true post-apocalyptic atmosphere.

In Ultimate Zombie Defense 2, players must survive relentless waves of smarter and deadlier infected by building fortified bases using military-grade defenses like fences, turrets, and mines. Customize your arsenal by purchasing and modifying a wide variety of weapons with tactical attachments. It’s a high-stakes fight to save humanity from total annihilation.

"The Last Stand: Aftermath" is a survival-action role-playing game set in a post-apocalyptic world overrun by zombies. The player must scavenge for resources, craft items, and navigate through a dangerous landscape while managing their health and stamina. With a focus on melee combat and strategic decision-making, the game offers a challenging and immersive experience in a grim, post-apocalyptic setting.

"Overture is a single-player Role Playing game that combines action-adventure and roguelike elements for intense and challenging gameplay. Explore vast randomly generated dungeons, engage in difficult boss fights, and collect an arsenal of weapons and loot. With 24 character classes and a chiptune soundtrack, Overture promises a delightful and immersive experience, but be warned: it will 'kick your butt and not apologize'."

"Zombie Defense" is a real-time strategy game where players must defend their base from hordes of zombies. Use a variety of weapons, special upgrades, and strategic planning to survive each wave. With endless levels, multiple difficulty options, and online cooperative play, the challenge to stay alive is always present.

"Alien Breed 2: Assault" is a sci-fi survival horror game set in a space vessel overrun by alien invaders. As a space marine, players must navigate through the ship, battle aliens, and complete objectives to progress. The game features improved graphics and new gameplay elements compared to its predecessor, including a new melee system and more destructible environments. Co-op play is also available, allowing players to team up and fight the alien threat together.

In the open-world setting of Paradize Project, players must survive a zombie apocalypse, either alone or in multiplayer. Clever survivors have discovered a way to control the undead, who can then be used as unstable but helpful allies for defense, building barricades, and fending off other zombies. The game features survival, combat, and strategic elements in a new take on the zombie genre, where players must outsmart and outshoot enemy clans to thrive.