Games Like Colony Siege

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.

Why similar: Tower Defense 47.6%, Strategy 28.3%, Co-op 12.8%, Sci-fi 10.1%, Indie 1.2%

Great strategy is timeless. Build, adapt, and defend across dynamic maps, solo or online - every session brings new strategies, new solutions, and new surprises. Now is the perfect time to enter the grid.

Why similar: Tower Defense 26.5%, Strategy 19.4%, RTS 17.9%, Co-op 9.4%, Sci-fi 8.7%

Defend against thousands of enemies in this explosive tower defense game. Deploy upgradable towers and unleash powerful orbital abilities as you try to protect Earth's first colony world from destruction.

Why similar: Tower Defense 34.1%, Real-Time 23.7% ★, Strategy 23.4%, Base Building 9.9%, Sci-fi 8.8%

Element TD 2 sees you combine powerful elements to create unique towers. Prove your defenses against challenging foes, and compete or cooperate with others to determine who has mastered the elements.

Why similar: Tower Defense 37.2%, Strategy 23.4%, RTS 18.8%, Co-op 9%, Online Co-Op 5.8%

Defense Task Force Featuring Large Scale Procedurally Generated Tower Defense Battles with FPS Quality Visuals and Infinite Waves. 10 tower types, with different attacks , 3 levels plus boosts. 25 Enemy alien species: Regulars, Swarmers, Racers, Cloakers, Healers, Boss Units and Spawners.

Why similar: Tower Defense 38.8%, Strategy 32.1%, Simulation 19.1%, Sci-fi 8.4%, Indie 1.6%

The Riftbreaker is a solo or Co-op base-building, survival game with Action-RPG elements for up to 4 players. Hack & slash countless hordes of enemies. Build up your base, craft powerful weapons and research new inventions to survive.

Why similar: Tower Defense 26.9%, RTS 15.1%, Strategy 14.9%, Co-op Campaign 11.4% ★, Base Building 11.2%

Creeper World 3 is what happens when cellular automata takes over a strategy simulation. Instead of discrete units that attack your base, a fluid-like substance spreads over the terraformable terrain. Your base, your weapons, your strategy... you must adapt them all.

Why similar: Tower Defense 50.7%, Strategy 23%, RTS 11.4%, Sci-fi 4.9%, Simulation 4.6%

Build and design the terrain while defending your stronghold against alien invasion in this unique Roguelike tower defense. Choose from 30 heroes, survive enemy waves, and upgrade a variety of destructive towers to hold the line!

Why similar: Tower Defense 38.2%, Strategy 24.7%, RTS 21%, Base Building 10.6%, Sci-fi 5.6%

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.

Why similar: Tower Defense 65.5%, Strategy 25.7%, Sci-fi 7.9%, Indie 0.8%

They Are Billions is a Steampunk strategy game set on a post-apocalyptic planet. Build and defend colonies to survive against the billions of the infected that seek to annihilate the few remaining living humans. Can humanity survive after the zombie apocalypse?

Why similar: Tower Defense 26.6%, Strategy 26.2%, RTS 23.3%, Base Building 16.8%, Survival 6.5%

Employ lethal turrets, traps, and gadgets to defend against an onslaught of evolving creeps! Step into a twisted, hyper 3D, mind bending realm. Upgrade and adapt your defenses. Become a master maze crafter. Collect bizarre artifacts. Rush creeps for lucrative rewards, and succumb to greed!

Why similar: Tower Defense 41.4%, Strategy 27%, Sci-fi 11.7%, Online Co-Op 10.2%, Survival 5.3%

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?

Why similar: Tower Defense 41.9%, Strategy 28.5%, RTS 12.9%, Base Building 8.7%, Sci-fi 7.1%

Warstone is a Tower Defense game, with RPG, Strategy, and even city building elements. Detailed Hi-res graphics and beautiful illustrations combine with a deep storyline to draw you into the world.

Why similar: Tower Defense 46%, Strategy 31.8%, RTS 9.2%, Co-op 9%, Multiplayer 2.6%

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.

Why similar: Tower Defense 45.1%, Strategy 32.4%, Sci-fi 14.3%, Survival 8.2%

TOWER ▪ DEFENSE ▪ STRATEGY. Control Vessels. Utilize their uniquely deep set of towers. Create an everchanging defense. Play with friends. Protect your Basin at all costs. An absolute Tower Defense, Real-Time Strategy Hybrid

Why similar: Tower Defense 32.7%, RTS 23.5%, Co-op 13.6%, Strategy 10.9%, Online Co-Op 7.9%

Command Mobile Outpost and take XEN Firearm to venture deep into the Signet surveillance off-limit area. Collect unique Weapon Units. Amp up the firepower of the Outpost that fights with you. This is an FTD game - FPS, Tower Defense, Base Building and much more all at the same time.

Why similar: Tower Defense 28.5%, Strategy 19%, RTS 17.4%, Co-op 12%, Base Building 9.6%

Axon TD lets you expand the map boundaries themselves. A huge arsenal of towers and a wide variety of enemies clash in a battlefield that grows to your whims. Engage in single, cooperative, and roguelite gameplay.

Why similar: Tower Defense 32.1%, Strategy 20.9%, RTS 18.8%, Sci-fi 8.3%, Co-op 8.2%

Age of Darkness: Final Stand is a dark fantasy survival RTS where you must illuminate, build and defend humanity’s last bastion against hordes of Nightmares. Set in the remnants of a kingdom consumed by a deadly fog, you decide. Will you hide in the light? Or take back your world.

Why similar: Tower Defense 29.7%, Strategy 21.3%, RTS 21.2%, Co-op 9.7%, Base Building 9.6%

Build your defense base to fight back the undead hordes of Mars and secure the future of the red planet. MarZ is a game of strategy and tactical defense where you must carefully manage your crew and resources as you try to uncover the terrible secrets of the undead.

Why similar: Tower Defense 36%, Strategy 28.5%, RTS 21.1%, Base Building 7.4%, Sci-fi 6.1%

From the Command & Conquer veterans at Petroglyph comes the first ever survival RTS set in the savage world of Conan the Barbarian. Play solo or team up in multiplayer in Conan Unconquered’s action-packed co-op Mode where you build a shared stronghold and fend off the hordes together.

Why similar: Strategy 35.3%, RTS 19.8%, Tower Defense 14.2%, Simulation 9%, Co-op 9%

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.

Why similar: Strategy 37.4%, Tower Defense 32.9%, RTS 21.6%, Sci-fi 7%, Indie 1.1%

Play solo or in co-op with friends, take control of the hive and protect it from enemies. Build factories and defence, research technologies and, if necessary, use nuclear weapons, but do not let the enemies harm the queen!

Why similar: Tower Defense 28.7%, Strategy 21.3%, RTS 18.4%, Co-op 10%, Base Building 9.3%

Build and design your own fleets and stand opposed to the Particulate in this physics/strategy/RTS/fleet hybrid. Build partially destructible and self repairing ships that interact with enemies less controlled by some scripted logic and more driven by a real time massive physics particle simulation.

Why similar: Strategy 41.2%, Simulation 21%, RTS 19.6%, Tower Defense 10.4%, Sci-fi 5.9%

Discover one of the hardest tower defense games with strategic elements, individual gameplay and challenging mechanics. Play together with your friends in co-op mode, create a team and compete with other players in the online ranking.

Why similar: Tower Defense 33.3%, Strategy 26.7%, RTS 19.7%, Base Building 7.9%, Co-op 5.6%

Build and defend your fortress while expanding out in this hold-out tower defense roguelite. Battle across a procedural alien homeworld, fight back corrupted terrain, discover hundreds of structures and upgrades as physics-driven swarms threaten to wipe out humanity.

Why similar: Tower Defense 34%, Strategy 24%, RTS 22.7%, Base Building 10.6%, Sci-fi 8.6%

Colony Survival is a unique first-person strategy game developed by a two-man team. Build your own colony in a voxel world. Command guards, farmers, miners and other colonists. Defend your colony against the horde of monsters that attacks every night!

Why similar: Strategy 34.2%, Base Building 21.9%, Survival 13.6%, Co-op 11.3%, RTS 9.4%

Harvest: Massive Encounter is an award-winning real-time strategy game with battles of epic proportions and a unique style of resource management and exploration. Build power plants, mineral harvesters and defense towers and make sure they have sufficient energy to fend off endless hordes of evil aliens.

Why similar: Tower Defense 49%, Strategy 42.3%, Sci-fi 6.7%, Indie 2%

From Glory To Goo is a Sci-Fi survival RTS set on an alien world. Serve as humanity's bulwark by establishing a colony and supporting your colonists still in orbit. But beware, for The Goo, a relentless and shape-shifting force approaches from all sides, even above and below.

Why similar: Tower Defense 30.7%, RTS 23.1%, Strategy 20.4%, Base Building 10.8%, Simulation 10%

An open-ended factory management game with RTS and tower defense elements.

Why similar: Tower Defense 30.4%, RTS 20.3%, Strategy 20.3%, Base Building 11.3%, Co-op 7%

Stellarcraft is a sci-fi tower defense adventure: explore alien planets, gather resources, build defenses, and fend off waves of enemies, solo or in 4-player co-op. 🚀

Why similar: Strategy 20.5%, Co-op Campaign 19% ★, RTS 13.6%, Co-op 11.6%, Online Co-Op 8.6%

Protolife is an unique tower-based strategy game which gives you a direct control over the builder robot in a struggle against the hungry proto-life organism.

Why similar: Tower Defense 33.1%, RTS 23.3%, Strategy 23%, Base Building 10.4%, Sci-fi 9.2%

A colorful but challenging blend of classic RTS and tower defense. Build, expand, research, and defend your alien colony as you race to construct a teleportation device and escape a dying star.

Why similar: Tower Defense 27.5%, Real-Time 19.7% ★, RTS 18.5%, Strategy 18.4%, Base Building 7.4%

Rush for Glory is featuring challenging and rewarding Tower Defense battles, in which players are defending their base against an alien invasion. By strategically building towers and upgrading them, the player can keep his base safely and further progress through the extensive singleplayer campaign.

Why similar: Tower Defense 55.6%, Strategy 44.4%

Retreating ends here. Defend Bastion against evil hordes, reclaim lost powers, rebuild ancient ruins, and adapt your tactics to reverse the siege. Shape your playstyle in this hero-strategy rogue-lite solo or co-op up to 3 players.

Why similar: Tower Defense 29.7%, Strategy 21.2%, RTS 20.2%, Co-op 13.8%, Online Co-Op 9.3%

Command your own fortress in FTL-like real-time battles! Crush the enemy fortress with unrelenting bombardment or seize it with carefully executed invasion.

Why similar: Strategy 45.1%, Tower Defense 28.2%, Simulation 16.7%, Base Building 8.3%, Indie 1.7%

The unstoppable fluid enemy has returned and destroyed every world in its path! Defend against Creeper as it floods across the 3D terrain in this real time strategy game where the enemy is a fluid.

Why similar: Tower Defense 33.2%, RTS 22%, Strategy 21.8%, Simulation 12%, Sci-fi 8%

An infinitely replayable multiplayer and single-player tower defense. Defend against waves of enemies and destroy the enemy's king before they destroy yours. Legion TD 2 is a one-of-a-kind game of tactics, teamwork, and prediction. Party as 1-8 players.

Why similar: Tower Defense 37.2%, Strategy 21.9%, Co-op 10.4%, Online Co-Op 7.9%, Base Building 7.4%

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.

Why similar: Tower Defense 45.1%, Strategy 25.2%, Co-op 16%, Sci-fi 5.2%, Multiplayer 3.8%

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.

Why similar: Tower Defense 51.2%, Strategy 19.4%, Co-op 13.5%, Sci-fi 5.8%, Online Co-Op 5.5%

Operation: New Earth is an intense sci-fi multiplayer strategy game in which you must command an advanced military facility to defend Earth from a hostile alien invasion. Create an alliance, gather resources, and unlock advanced technology to level up your stronghold!

Why similar: Strategy 62.7%, Simulation 19.4%, Sci-fi 10.9%, Multiplayer 4.3%, Survival 2.8%

The ultimate mash-up of Real-time Strategy and Tower Defense!

Why similar: Tower Defense 55.1%, Strategy 30.4%, Sci-fi 7.5%, RTS 5.6%, Indie 1.3%

The best elements of Real-Time Strategy (RTS) and Tower Defense genres combined into a new Base Defense game. Defend against countless waves of enemies while you expand your base, gather resources, and research technologies to defeat the ever strengthening enemy units.

Why similar: Tower Defense 38.6%, Strategy 26.7%, RTS 26.4%, Base Building 8.2%

Project Astra Dominium is a Tower Defense game with Basebuilding and Automation elements. Build up your base to become a supply hub for Earth's desperately needed materials, gather resources while defending against an unknown alien threat and improve your tower's and AI capabilities.

Why similar: Tower Defense 38.4%, Strategy 24.3%, Simulation 14.2%, Base Building 12.3%, Sci-fi 9.4%

Here Comes the Swarm is a survival RTS with a pause button! Create your strategy, build, manage, and defend your settlements at your own pace. Take the fight to the hive mind and lead expeditions to deliver a deadly blow and eradicate your foes. Will you reclaim Ulora from the relentless Swarm?

Why similar: Tower Defense 26.3%, Strategy 23.4%, RTS 21.3%, Simulation 12.8%, Base Building 10.1%

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.

Why similar: Tower Defense 51.7%, Strategy 42.7%, Sci-fi 3.9%, Indie 1.6%

Gather coins, build defenses and reclaim your fallen Kingdom. Explore and uncover secrets, unlock new technologies and protect your crown versus waves of Greed monsters that come at night. Kingdom is a solo or co-op micro-strategy and tower defense game set in an atmospheric pixel world.

Why similar: Tower Defense 36.4%, Strategy 18.4%, Simulation 11.3%, Co-op 10.3%, Base Building 8.4%

You and allies, avian inhabitants of Sanctree City, build structures and production lines on the tree, crafting weapons to fend off subterranean insects. Defense is just the start—dig deeper, destroy nests, fortify new defenses against escalating threats for an impregnable stronghold.

Why similar: Tower Defense 33.8%, Strategy 21.8%, Simulation 14.2%, Base Building 12.7%, Online Co-Op 11.5%

“Alien Marauder” is a real-time strategy game with survival and confrontation theme. In this game, you will be the leader to a treacherous alien planet, build and defend base to survive against the vexan waves. Make the right decision!

Why similar: Tower Defense 26%, RTS 23.7%, Strategy 23.4%, Sci-fi 10.3%, Base Building 10.3%

MILLIONS OF ALIENS WILL DIE!Radiant Defense is a tower defense game set in a vibrant universe invaded by countless alien hordes.Build your space fortress any way you wish, set up wide variety of weapons and traps and let the invasions begin!

Why similar: Tower Defense 43.8%, Strategy 34.5%, Simulation 14.7%, Sci-fi 5.3%, Indie 1.6%

Build a castle by day and defend it by night. Becastled blends cozy city-building with challenging tower defense strategy. Lead the Sun Kingdom’s last stand against the Moon Beasts and end the ancient conflict between light and darkness!

Why similar: Strategy 41.7%, RTS 26.1%, Base Building 20.3%, Tower Defense 8.4%, Survival 2.9%

Lead an armored squad through the perils of this reversed tower defense action-strategy game!

Why similar: Strategy 48.6%, Tower Defense 33%, RTS 8.6%, Sci-fi 8.4%, Indie 1.4%

Stunning detail of levels, in-depth gameplay, finely tuned balance of all levels and turrets. During the game you will hold your defense with your turrets against the massive hordes of enemies.

Why similar: Tower Defense 54.1%, Strategy 43.9%, Indie 2%

"League Tower Defense" is a strategy tower defense game that combines unique defense towers and various upgradeable components to unleash different attack effects. Come and build your perfect defense line.

Why similar: Tower Defense 46.6%, Strategy 34.7%, Sci-fi 11.5%, Base Building 6.9%, Indie 0.2%

A Co-Op FPS game with base building in a post-apocalyptic world. Craft weapons, build barricades and automated turrets, unlock new gear and items for visual customization and kill all savages and mutants trying to destroy the remnants of human civilization.

Why similar: Tower Defense 34.7%, Real-Time 22.9% ★, Strategy 21.6%, Base Building 11.7%, Sci-fi 9.1%

With 100+ truly unique units, Zero-K is an RTS of freedom and creativity, tempered by a decade of refinement. Sculpt land into a castle and throw invaders off it with a Jugglenaut. Explore a massive campaign, solo or co-op. Hop online for epic 32 player battles or fast paced 1v1, on 100s of maps.

Why similar: Strategy 29.4%, RTS 25.3%, Real-Time 15.1% ★, Simulation 11.3%, Co-op 5.9%

Want a tactical and strategic tower defense challenge that's packed with options and upgrades? Take command of the dropship Sentinel and do battle across a vibrant sci-fi world.

Why similar: Strategy 51.8%, Tower Defense 31.4%, Sci-fi 14.1%, Indie 2.6%

Build your base, prepare your troops, and face your most epic battle yet in this old-school real-time strategy game. Choose between two factions, test your skills in three epic campaigns and engage in online battles with up to 16 players simultaneously.

Why similar: RTS 34.5%, Strategy 27.2%, Base Building 11.4%, Co-op 10.9%, Sci-fi 9.6%

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.

Why similar: Tower Defense 53.2%, Strategy 22.1%, Co-op 11.4%, Sci-fi 5.5%, Online Co-Op 4.4%