Games like Alien Hallway on Steam
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Anomaly 2
Anomaly 2 is a sequel to the critically acclaimed Anomaly Warzone Earth. Maintaining the core elements of the original, Anomaly 2 adds plenty of new features: unit morphing, over million tactical combinations, post-apo world and tower defense vs tower offense multiplayer mode.
Anomaly Korea
Exclusively brought to Steam for PC, Mac and Linux in Anomaly Bundle, Anomaly Korea is an expansion campaign to Anomaly Warzone Earth. The alien robots are back and this time they’ve got Korea in their sights. It’s your job to lead a squad into fierce fire-fights and fend off the alien invasion.
Anomaly Defenders
Anomaly Defenders is the closing installment of the Anomaly series. The original incarnation of the Tower Offense sub-genre had players controlling humans fighting alien invaders. Now, the tables have turned. The human counterattack is underway and the alien homeworld is under threat.
Anomaly Warzone Earth Mobile Campaign
Anomaly Warzone Earth Mobile Campaign continues Steam's Anomaly Warzone Earth in an extra 15-level campaign. Originally released on mobile devices, the campaign is brought to Steam for PC, Mac and Linux exclusively in Anomaly Bundle. AWE Mobile Campaign turns tower defense on its head.
X-Morph: Defense
Unique fusion of a top-down shooter and tower defense strategy. You are the invader! Use destructive weapons or lead your enemies into a maze of towers. Strategize in the build mode by carefully selecting various types of alien towers or throw yourself right into the heat of the battle.
Anomaly: Warzone Earth
Lead an armored squad through the perils of this reversed tower defense action-strategy game!
Infested Planet
Command a team of 5 elite soldiers against an alien horde of 100,000. Surrounded on all sides, you must outmaneuver and outsmart the enemy.
Defense Zone 3 Ultra HD
The sequel to the hit strategy game, with new weapons, landscapes, and options.
Taur
Taur is an action-strategy sci-fi game. Control the Prime Cannon and unlock all of its powerful weapons and abilities. Build turrets, droids, aircraft and more as you fight to protect the homeworld of the Tauron droids against a relentless invasion. Will your Taur stand against the Imperion warmachine?
Alien Shooter TD
Innovative Tower Defense inspired by legendary Alien Shooter series! The game was created in keeping with the best traditions of Sigma`s games, no concessions of any kind - everything is just like in real life!
Revenge of the Titans
The ultimate mash-up of Real-time Strategy and Tower Defense!
Unstoppable Gorg
Defend the solar system from fearsome aliens by sending satellites into orbit in revolutionary tower defense action!
Age of Steel: Recharge
"Age of Steel: Recharge" is a 2D strategy with a view from the side. You're taking the role of commander, who was entrusted the management of the military base. Your mission is to defend a base from the waves of enemies at any price.
CARNAGE OFFERING Tower Defense
The replicator robots are back! It's 2528. The machines are increasingly infecting the planets with genetically modified monsters. Challenge them and try to stop the onslaught. Upgrade buildings and heroes, mine resources, discover technology and fight to save humanity!
Village Feud
The 2 villages on the island don't get along very well. You are the mayor of one of these cities, grow your city, earn gold, buy troops and attack the other village. Defeat the other mayor and claim the island, play against your friends or try out singleplayer.
Hostile Waters: Antaeus Rising
In 2032 an Earth that knows only peace is forced to relearn the art of war. Twenty years have passed since the population of Earth did a fine job of destroying nearly everything in one final struggle for power by the politicians and military leaders.
Toy Soldiers: Complete
Bring your toys to life in this action-packed, Toy Soldiers game bundle which includes the original Toy Soldiers, Toy Soldiers: Cold War, and all four DLC’s – Kaiser’s Battle, Invasion, Napalm and Evil Empire.
2112TD: Tower Defense Survival
Get ready for the ULTIMATE tower defense onslaught. Build, deploy, research and upgrade your defenses in this epic, old school RTS inspired sci-fi adventure.
Fortified
Fortified is an explosive strategy shooter where players will defend the Earth against a menacing Martian invasion in the 1950s. Play as one-of-four pulp inspired heroes as they fight swarms of terrifying robots with an arsenal of Cold War era weapons and experimental technology.
Defense Grid: The Awakening
Defense Grid: The Awakening is a unique spin on tower defense gameplay that will appeal to players of all skill levels. A horde of enemies is invading, and it's up to the player to stop them by strategically building fortification towers around their base.
GemCraft - Chasing Shadows
An epic, challenging tower defense game with an emphasis on strategy and replayability. Summon gems of immense magical potency and harness their unique abilities against a seemingly endless horde of monsters. The archdemon seeks to swallow the world, and you must journey to stand against her.
Mechs V Kaijus - Tower Defense
Mechs V Kaijus is an addictive hardcore tower defense gameplay. In Mechs V Kaijus you take on the role of Commander of a powerful Mechs squadron. Improve your Mech, strategically place towers and factories on the battlefield. Deploy support units on the battlefield, and save our civilization.
Steampunk Tower 2
Steampunk Tower 2 is an action-strategy game set in the alternative Steampunk universe. In Lord Bingham’s military service there is a new secret weapon under your command, the gigantic aircraft Carrier transporting the Battle Tower.
Zombie Tycoon 2: Brainhov's Revenge
Pick your faction, Monster, strategy, and find out who gets to become King of the Undead!
Halo: Spartan Strike
Halo: Spartan Strike makes you a Spartan supersoldier battling evil forces. Delve into 30 challenging missions through cities and jungles using a devastating arsenal of weapons, abilities and vehicles including the iconic Warthog against the Covenant and Promethean enemies. *DirectX feature level 10 required*
Battlepillars Gold Edition
Battlepillars is a real-time tug-of-war strategy game in which you command caterpillars armed to the teeth with flamethrowers, sticky honey, mines, machine guns, and more!
Bloons Adventure Time TD
Defend Ooo from the Bloon invasion in this epic tower defense crossover.
HERO DEFENSE
CREEPS CRUMBLE. HEROES RISE. Command a team of renegade heroes and impale, slash, tear and burn through legions of undead hell-bent on world domination. Your mission: to defeat the world’s most powerful vampire, Count Necrosis.
Freeman: Guerrilla Warfare
In the anarchic world of Freeman: Guerrilla Warfare, only the mightiest warlord rules. Start with a pistol and a few militias, you will set yourself on a wild and ambitious journey towards world domination. Enjoy the immersive combination of intense FPS and sandbox strategy.
Cubetractor
WINNER: IGF China award for BEST GAME!Cubetractor is a neo-retroesque action-strategy-puzzle hybrid where you defeat enemies through an unconventional cube-pulling, turret-buildling mechanic. The game carries elements of a reverse tower defence and a grounded bullet-hell dodger to deliver a unique gameplay experience presented in a...
Sanctum 2
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.
Time Rifters
Be your own teammates in this unique single-player co-op shooter!
Space Run Galaxy
Space Run Galaxy is the sequel to Space Run, the game from one-man studio Passtech, which seduced hundreds of thousands of players with its dynamic and original gameplay. By twisting the tower-defense game style, Space Run offered an addictive real-time spaceship construction strategy experience.
Space Run
Space Run is a «real-time spaceship construction strategy game». Space Run takes the well-known Tower Defense-style gameplay and twists it, challenging you to manage and protect a spaceship and its cargo against the hazards of deep space!
Kaiju-A-GoGo
Choose your giant monster! Destroy cities around the world! Rule the Earth in this light action-strategy game that harkens back to the classic PC monster city-stomping games of yesteryear!
The Culling Of The Cows
The Culling Of The Cows is a side-scrolling shooter / tower defence game. You will take the role of Sammy, a soliloquizing schizophrenic farmer with a self prophesied mission to lay waste to the disease spreading over his farm.