Protocol Meltdown
Manage BioFission Research's new highly unstable prototype nuclear reactor codenamed "Project Vermillion," produce enough power to satisfy demand and turn a profit, all while preventing it from destroying the entire facility.
The top results based on the latest update are Cosmula [Score: 1.0], Blacklist Brigade [Score: 1.0] and Ripper [Score: 1.0] The top rated games you can find here are Alien Swarm [SteamPeek Rating: 8.7] ranked #10, Door Kickers [SteamPeek Rating: 7.6] ranked #11 and SAS: Zombie Assault 4 [SteamPeek Rating: 7.2] ranked #13 Also don't forget to check the newest releases Invasion of the Lizard People [Release date: 2026-05-15] ranked #6, Cosmula [Release date: 2026-02-09] ranked #1 and Blacklist Brigade [Release date: 2025-07-24] ranked #2 While it is tempting to play with the newest and the best, there might be some other gems in the results, like SAS: Zombie Assault 4 [SteamPeek Rating: 7.2] ranked #13, Halo: Spartan Assault [SteamPeek Rating: 5.8] ranked #22 and Police Stories [SteamPeek Rating: 6.4] ranked #23.
Manage BioFission Research's new highly unstable prototype nuclear reactor codenamed "Project Vermillion," produce enough power to satisfy demand and turn a profit, all while preventing it from destroying the entire facility.
Engage in an intense space shooter that you can play in single-player or multiplayer with up to 6 players. Play a variety of different spaceships, each with their own unique stats, components, and playstyles!
Blacklist Brigade is a co-op focused top-down shooter game, where players as a part of a mercenary group fight against banana republic dictators and other evil scoundrels.
Ripper is a top-down shooter with fully destructible environments, fog of war, and Steam multiplayer. Break through walls, survive enemy waves, and battle your friends.
You and your teammates must survive as long as possible against relentless robots and deadly creatures. Your aim matters, but so does your strategy. Every enemy type fights differently, so stay ready. Fortify your base with turrets, healing stations, traps and a variety of upgrades.
Welcome, trainee! Use tactics and special equipment to become a true cop in the free version of Police Stories: The Academy. Neutralize criminals, search for clues and find a "rat" in the police station alone or in co-op with a partner.
1–4 player co-op survival where you fight through waves of enemies, rack up kills, and collect powerful pickups to stay alive as long as possible. Fast-paced, chaotic runs push your limits every time.
CS2D is a free fast-paced top-down multiplayer shooter. Featuring many different game modes, a built-in map editor and much more.
Compete against rival companies in a ruthless multiplayer business war. Build your corporation, hire employees, invest in legal and illegal operations, sabotage competitors, survive inspections, and become the richest entrepreneur in the city.
Defend the castle, obstruct enemies, and prevent the insidious corruption from infiltrating the heart of the realm.
Co-operative multiplayer game and complete code base available for free.
Door Kickers is an innovative realtime strategy game that puts you in charge of a SWAT team and lets you command them during a tactical intervention.
Blast your way through countless leagues of enemies in this intense top-down shooter.
Purge the undead! Intense action-shooter with deep rpg elements, including upgradeable guns and armor, unique class skills, and class special abilities. Entire game can be played single player or as a 4-player online co-op game, including PvP events like Last Man Standing.
Fear of The Undead: Rise of Evil features a PvE battle with wave progression, the further the player goes, the harder it gets. It offers 4 characters with distinct stories and abilities, along with a catalog of maps and weapons.
An apocalyptic disaster has left the door open for all kind of creatures to invade our home! Jump right into action in this hero-top down shooter-coop-roguelite experience, power up your survivors, defeat bosses and try to see how far you can get!
Gear up to dash, scale, and snatch the flag, then deliver it to your opponent's base with a mix of charm and explosive arrows. Outwit your rivals and win 3 out of 5 rounds to claim victory!
Unleash Your Inner Warrior in a Fast-Paced Top-Down 2D PvP Extravaganza! Strategy meets skill in intense player-versus-player combat! Master your hero, outsmart your opponents, and rise to the top in this vibrant, action-packed battleground.
Exterminate zombies in style with up to 4 players in this action packed co-op top-down shooter.
This is an innovative game that combines strategy, action and character development. David to the frontlines of the plant-animal alliance. Engage in fierce defensive battles against the powerful zombie horde, and uncover the fascinating stories behind every precious character in this world.
Team up with friends to fight hordes of zombies and mutants that roam post-apocalyptic earth. Need extra lives and allies to help you fight? Just clone yourself and your weapons! Protect your fabricator to become an unstoppable force, able to take on any mutant in your sights.
Grab your pickaxe and enter the mines! Search for treasures and fight against other miners in this fast, round-based multiplayer game (up to 10 players over LAN or internet). Comes with a map editor and an addictive single player endless mode where you fight waves of enemy monsters.
Halo: Spartan Assault brings the excitement of Halo combat to Steam for the very first time. Battle your way through 30 action-packed missions against the Covenant as you explore the origin of the Spartan Ops program featured in Halo 4. *DirectX feature level 10 required. *
A fresh take on top-down shooters with an emphasis on tactics that forces you to make split second decisions. Neutralize criminals, rescue civilians and defuse bombs in Single Player mode or Co-op. And remember - shooting first is not an option!
Little Savior is a real-time battle action game in which many units fight with each other. The player operates directly as one of the units to fight.
Survive as long as you can in an endless bullet hell with randomized stats and weapons.
Zombie Slayers is all about staying alive as long as you can. With plenty of weapons and defence options available you will face increasing amounts of zombies trying to end your career as a slayer. So, how long will you survive? Including playing as zombies (multiplayer-only).
Use the bathroom or defend your home from zombies? The choice is yours! Be Human... Or Die trying is a 1-8 player co-op defense game where killing zombies is just as important as taking a shower. Also did I mention that you play an alien in a mech suit? Yeah it's a weird game like that.
A new look at tower defense, full of dynamics and tactics! A terrible virus has struck humanity. You will have to build defenses with your friends or alone and fight off the hordes of zombies who want to get to you.
You are the commander on the last line of defense. Hold your base, recruit soldiers, and launch them via cannon to another collapsing front. A cooperative (1-2 players) tactical defense game where your decisions decide the fate of two battles.
Tankle is an amazing action packed multiplayer or singleplayer top down shooter, you have to dodge bullets and defeat enemies to progress and grow stronger!
Retro-style sci-fi top-down shooter and strategy game.
Fast-paced competitive FPS focused on precision, movement, and high-impact combat. Dominate intense online PvP battles or team up in cooperative modes against adaptive AI. Pure skill. Zero gimmicks.
Team up or face it alone in this top down zombie slaying defense adventure! Featuring up to 4 player online co-op, cleanse the infected wave by wave and upgrade your base with traps & defenses to build the Ultimate Zombie Defense. Can YOU stop them?
Sequel to the best-seller The Red Solstice. Plan your strategy and infiltrate a real-time tactical battlefield - alone or with up to 7 squad members. Can you demonstrate the combat prowess to survive and secure a future for humanity?
Repossession is a 2D Action-Packed Shooter, Heisting Game, with Deathmatch and Multiplayer Coop to Come - Either fighting their way through missions, robbing bank after bank, or with each other. (soon) - they descend through Chaos for Big Earnings and pay off the remaining debt.
Multiplayer game of hiding and seeking, also with bots. Become an alien and use stealth to deceive others, or a marine and survive long enough to escape.
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