Top similar games like operation:

The New Z is a FREE TO PLAY multi-game mode experience. SURVIVE with friends and gather loot, stash and trade. Go into wars against other groups in a massive OPEN WORLD or face them 5 v 5 in COMPETITIVE.

Hitler’s hordes are back for more in this spine-chilling shooter from the makers of Sniper Elite 4! Abominable occult enemies, epic weapons and a harrowing new campaign for 1-4 players await in 1940s Europe, as you fight to save humankind from undead Armageddon!

Grab a weapon, demolish your enemies, level up, become more powerful, let the gore flow, let the limbs fly. BrainBread 2 introduces a zombie fps mixed with RPG / Arcade elements, the game is very action-packed and generally fast-paced.

The Ultimate BATTLE ROYALE! Sharpen your skills and kill everyone in your way as you hunt for guns, gear and glory in a massive battlefield where only ONE can be crowned the LAST MAN STANDING. Earn cash prizes in a monthly competitions,

Days of Ruin is a third-person post-apocalyptic zombie shooter featuring procedurally generated equipment stats and infinitely replayable maps. Players can repeatedly farm maps to acquire better gear and prepare for greater challenges!

This game is a post apocalyptic TPS game 。 It can not only "bump" against zombies, but also userole skills to fight zombies. the game has two maps and eight levels to challenge, This game is not a complete and mature commercial game. It is only presented as a personal work and is permanently free.

The chances of you surviving this all out war of society and the undead are slim to none. Already, there are millions of the walking dead shambling about, searching for food to eat. There's no known cure. One bite can possibly end it all for you. However, you aren't alone in this nightmare.

A 4-player co-op shooter set in a world overrun by mutant creatures. Use powerful yet risky doping effects to fight alongside your team and complete missions.

Dive into the zombie apocalypse with Zombie Panic! Source: a cooperative, survival-horror first-person-shooter. A fast-paced standalone modification.

Left to Survive is an action shooter game with the post-apocalyptic world setting with a base building feature. Become a hero, challenge other players, join tournaments, raid bases. Would you be able to survive in a dead world?

"Xeno Swarm" is a hardcore side-scrolling shoot-'em-up game. Team up with your allies to battle overwhelming swarms of alien creatures, engage in life-or-death showdowns with colossal bosses on extraterrestrial battlefields, and relive the exhilarating thrill of bullet-hell mayhem!

This is an extremely thrilling and challenging third-person shooter. If you like shooting games and Zombie Crisis, then this game must not be missed! It will give you an immersive gaming experience, immersing you in a world full of danger and mystery.

This is a third person shooter game The main plot is a secret experiment being conducted somewhere in the future During this process, a strange mineral was discovered and caused a large-scale infection The protagonist's task is to retrieve important "files" and escape from this place!

A fast-paced co-op zombie survival action game where players fight through hordes of enemies, unlock random power-ups, build different synergies, and escape together as a team.

Master gravity and parkour skills to slay hordes of enemies. As an elegant assassin, you can play solo or in co-op with friends.

In a free, add-on mod for Killing Floor, created by David Hensley (with help from Killing Floor originator, Alex Quick), you can fight off the bizarre and warped toys of someone's nightmare, that are hell-bent on finishing you off. All the standard Zeds are replaced with evil toys, set in the Devil's Dollhouse map.

Global Strike is a free FPS game which has more than 300 million faithful players in China. Now the battle is on, there are various modes and weapons for you to explore! Call your friends and join us,get into the battle field now!

Blending action and survival horror, Resident Evil 6 promises to be the dramatic horror experience of 2013.

Take on the challenge solo or team up with 2-4 friends in online co-op, repel the threats from the demonic realm with firepower, defend and explore areas, face stronger threats until reaching the destination. As darkness looms closer, you stand as the last line of defense.

Bio Goddess: Doomsday Begins is a third-person shooter survival game where players assume the role of a female high school student surviving in a school struck by a biochemical crisis. They investigate the events, uncover their connection to their father, and explore their own identity.

Fallen Earth Classic is a free-to-play massively multiplayer online role-playing game developed by Reloaded Productions and operated by Little Orbit. The game takes place in a post-apocalyptic wasteland located around the American Grand Canyon.

This is a shooter action game set in a world ravaged by a mysterious virus outbreak. Humans infected by the virus mutate into deadly creatures. Play as humans wielding firearms against mutants, or become the virus-infected mutants themselves and spread the infection.

A modern twist of a Zombie Round Base Multiplayer Game, can you survive

In 2039, tsunamis of varying degrees occurred all over the world, and multiple small black holes inexplicably appeared in the sky, ruthlessly devouring the world. At first, scientists believed that this phenomenon was a common natural disaster, until one day, a test report shocked the world.

This is a new type of PVE combat game that combines elements such as shooting, skill-based battles, exploration, search-and-destroy missions, PVE combat, survival in a free-roaming environment, vehicle control, and character customization.

RE Revelations 2 continues the series acclaimed essential survival horror experience, while uncovering startling truths.

Resident Evil® Revelations returns redefined for PC complete with high quality HD visuals, enhanced lighting effects and an immersive sound experience.

This game is a port of the Games for Windows - Live version that was released in 2009. If you buy the Untold Stories Bundle here on Steam, it will be the same as upgrading to Resident Evil 5 Gold Edition.