Top similar games like Circuit Defender:

Sanctum 2 is the sequel to the world’s first Tower Defense/FPS hybrid game. Pick from four unique character classes and embark on a mission to protect the oxygen-producing Cores from hordes of deadly aliens who are threatened by their existence.

Defender OF Falyndor is a First-Person Tower Defense game in Virtual Reality! Take control of your character, towers, and much more to protect Falyndor from waves of invasions to become the ultimate Defender of Falyndor!

Starship Troopers: Extermination is a 16-player co-op FPS that puts you on the far-off frontlines of an all-out battle against the Bugs! Squad up, grab your rifle, and do your part as an elite Deep Space Vanguard Trooper to take back planets from the Arachnid threat!

You think Tower Defense games are all about building? You thought wrong. Sanctum is not your average Tower Defense title. When the havoc starts, you get to join the fray! As one of the world’s first First Person Shooter - Tower Defense games, Sanctum has taken the best of both worlds to deliver an epic, one-of-a-kind experience.

Technitive is a first-person open world tower defense set in 2043, where you advance from primitive tools to machines and modern weapons. A colonization attempt is set on an Earth-like planet after an extinction threat to Earth. Colonize the planet and save mankind!

Fight against endless hordes of zombies in this action-packed, round-based survival game inspired by classic zombie shooters! Explore diverse maps, upgrade weapons, deploy automatic turrets, and call in airstrikes. Customize your arsenal with attachments and skins. Play online or in split-screen.

Silica blends FPS and RTS in epic, photorealistic battles. Choose to fight on the ground or command from above as humans or aliens. Dive into thrilling multiplayer combat or master strategic command. Are you ready to survive and conquer?

Play with friends and defend The Tower from corrupt robotic organisms.

Stop the escape of the infected automata in this Local Co-op Tower Defense First Person Shooter game for VR. Choose between playing solo or collaborating with a friend to build defensive structures and fight the Automata to avoid their escape.

A cooperative action tower defense and third-person shooter where vision is mutually exclusive. Place towers to shine light on the endless horde of bugs, or use augmented vision to fight alongside defenses. Equip powerful modules that unleash your strategy's true potential!

Defend the furnace from waves of goblins by building and upgrading in an FPS tower defense.

Step into a world over run with Mycha, a strange mineral with seemingly magical powers. Clear monster-infested environments and protect researchers on your own or with up to three other players online. Welcome to The Federation.

An online PvE co-op action game for up to 4 players. Work together with your team to manage your limited inventory, complete objectives, and destroy endless waves of ferocious robots.

Meet Your Maker is a building game of brutal expression and conquest. Unleash your inner evil genius in co-op or single-player to build the ultimate fortress of devious deathtraps, or take on those built by others in a high-stakes heist to steal resources essential for your survival.

(This description has been redacted)

CrossPlanet is a fast-paced, third-person shooter where players battle across diverse environments in intense PVP and PVE combat. Wield a variety of weapons, outmaneuver enemies, and take on massive alien creatures in dynamic multiplayer skirmishes. Are you ready to fight?

Dive into non-stop action in a movement-based arena shooter, blending some of the most familiar gameplay elements of the genre into a completely new experience, build around the idea to have the most fun with your friends you could possibly have with a movement shooter.

Defend your world as sentient Props in Puropu Defense Squad! Build, upgrade, and evolve your heroes to crush waves of filthy humans worldwide. Dive into a unique mix of third-person action and tower defense—solo or with friends—in an endlessly replayable co-op campaign!

Join the Vikings in an epic tower defense adventure! Defend your ship against mythical bosses while mining resources and upgrading skills. Battle solo or team up with friends in online co-op for a journey of strategy, conquest, and victory.

Pushing the boundaries of what fans have come to expect from the record-setting entertainment franchise, Call of Duty®: Black Ops II propels players into a near future Cold War

In MECHWARRIOR 5: CLANS, players become new Smoke Jaguar pilots in the Clan Invasion of the Inner Sphere. Lead a five-mech "Star" squad across diverse planets, engaging in an expansive campaign with immersive gameplay and intricate combat. Customize BattleMechs and explore strategic options.

A fast-paced VR arcade shooter, where you fire guns, shoot energy bows, and toss explosive spears to defend your base from an alien infestation. The bugs shoot back, so don't forget to duck!

Play as one of 3 factions as they fight for control of Domusalus. But beware of the Kaecillian menace as they threaten both the locals and the invading factions. Deploy with your gear, search for loot and escape in time to keep it.

Eden Star is a fast paced Sci-Fi survival game that blends unique physics based combat, destructible environments and free-form construction with the exploration of a hostile alien world.

Spectre Divide is the genre-evolving, free-to-play 3v3 tactical shooter driven by Duality. Use Duality to control two bodies in real-time, letting you defend two sites at once, cover your own cross, or even trade yourself. Master tactical gunplay and an arsenal of future tech to achieve infamy.

Guardians Frontline is a sci-fi VR shooter that makes you a soldier and a commander. Fight off enemies and build bases in a single-player and co-op campaign, plus PvP game modes with full cross-play support.

INFILTRATE, EVALUATE, ANNIHILATE. Working together or alone, exploit a time loop to gather information, create a plan, and neutralize a rogue intelligence system threatening to destroy humanity in this first-person sci-fi knowledge-based immersive sim.

Zero Hour is a tactical FPS with online team-based game play that takes place in a variety of fictional locations interpreted in Bangladesh with Real-life scale & resource management. It brings a grounded, close quarter combat experience to the game.

Multiplayer sandbox with destructible environment. Destroy different maps, build your own, and play with your friends and other people online

Project NOVA is a hyper-fast, chaotic shooter inspired by ULTRAKILL, DOOM, and REAVER. Dive into relentless multiplayer battles with dynamic weapon mechanics, tech-fueled movement, and diverse game modes. Master the chaos, never stop moving, and unleash unparalleled fun on the battlefield!

Fight for survival! Industrial waste has disturbed the dangerous Kaeru-tori's habitat, forcing them into the city. Unlock new areas, purchase weapons and upgrades to grow stronger, and fight off the horde with your friends!

Incursion Red River is a tactical first-person extraction shooter set in war-torn modern day Vietnam. Exclusively single-player and co-op gameplay! Customize your loadout, complete contracts & extract, or die trying!

ZombCube is a first-person, cross-platform, zombie survival, wave based game. Play solo or with friends all over the world destroying the evil ZombCube's. Use teamwork, leadership, and skills to be the best and rank on the leaderboards.