Games Like Sphere Invasion

A planetary tower defense where enemies attack across land, air, and space. Build layered defenses, manage resources, and survive an escalating alien invasion.

Why similar: Tower Defense 28.9%, Real Time Tactics 19.3%, Military 12.7%, Strategy 8.2%, Tactical 6.7%

A sci-fi tower defense game. Build an army of towers to stop waves of a lured alien species called Zektid's.

Why similar: Tower Defense 25.6%, Real Time Tactics 23.5%, Strategy 12.4%, Military 12.3%, Space 7.7%

M.A.C.E. Tower Defense 2, a classic tower defense game with unique towers and enemies

Why similar: Tower Defense 28.2%, Real Time Tactics 26%, Strategy 14.1%, Military 13.3%, Tactical 7.2%

Loop Defense is a single-player sci-fi tower defense game. Build enemy routes with base walls, assemble a modular defense, manage limited loadouts, energy, and research, face armored, flying, carrier, and wall-breaker units across a star map, or challenge Endless Mode.

Why similar: Real Time Tactics 22.6%, Tower Defense 21.3%, Military 14.8%, Space 10.1%, War 9.2%

A grand and intense tower defense science fiction game, where you only need to purchase once to enjoy all the content of the game.

Why similar: Tower Defense 21.8%, Real Time Tactics 21%, Military 12.3%, Strategy 7.8%, War 7.7%

Are you prepared for a thrilling toy army tower defense adventure? Welcome to the Toy Shire! Battle diverse foes in various locations, defend your family, and repel foes from your area. Save the world by strengthening your defense with toy towers! FULL GAME AVAILABLE NOW!

Why similar: Tower Defense 27.2%, Real Time Tactics 17.5%, Military 12.6%, War 9.3%, Tactical 7.6%

Bad coffee. Boredom. And now—war. Southern forces have invaded the North in a dangerously curious conflict. Use your wits in Lore of Terra, a handcrafted tower defense game with charm, chaos, quirky characters, 9 continents, and 80+ unique allies and foes.

Why similar: Tower Defense 30.8%, Real Time Tactics 28.2%, Strategy 15.7%, Tactical 11.3%, Resource Management 7.7%

BTR Ringfall is a tactical lane-based tower defense game. Deploy 7 unique elemental operatives across 5 battle lanes, manage Ring Energy, unleash powerful abilities, and combine your operatives to create devastating elemental reactions and defend the Ring.

Why similar: Tower Defense 34.6%, Real Time Tactics 28.5%, Strategy 13.2%, Sci-fi 8.4%, Resource Management 7.7%

A unique 3D tower defense game set on randomly generated planets! Place towers to defend against 360-degree attacks, protect mining outposts, and survive intense meteor waves. Earn resources, and face endless replayability with dynamic challenges every playthrough!

Why similar: Tower Defense 23.7%, Real Time Tactics 20%, Space 12.4%, War 8.9%, Resource Management 7.5%

Classic Tower Defense meets space exploration. Build turrets on mining platforms, harvest enemies to build more defenses, and mine Dark Energy to travel the stars. As a sentient AI, you must upgrade your tech, scan planets, and find a new home for humanity before Earth fades away.

Why similar: Real Time Tactics 30.1%, Tower Defense 26.8%, Strategy 10.7%, Space 7.6%, Tactical 5.8%

Eternal Siege is an evolutionary tower defense based around min-max resource management, efficient use of spells, and (hopefully) building some towers. Start in the Ancient Greek era and defend your way through the human eras (Roman, medieval, modern, etc). Can you survive the human extinction era?

Why similar: Tower Defense 29%, Real Time Tactics 17.8%, Tactical 11.1%, Building 10.9%, Resource Management 9%

Command a radar-guided air-defense network against drones, cruise missiles, and ballistic threats. Buy intelligence, deploy radars and launchers, manage a limited stock of interceptors, then investigate every breach before the next attack begins.

Why similar: Tower Defense 28.9%, Real Time Tactics 23.7%, Military 15.8%, Strategy 10.9%, Resource Management 9.1%

Scrap Wars: TD is a Post-Apocalyptic Tower Defence game where strategy meets chaos! Build and Upgrade powerful Towers, Customize their Strengths, and Defend your Base against relentless waves of Enemy Vehicles across three unique Scenarios or Battle for as long as you can in Endless Mode!

Why similar: Tower Defense 25.9%, Real Time Tactics 21.7%, War 11.9%, Building 9%, Strategy 8.4%

The hungry Gooper swarm threatens intergalactic peace. Stop them! Build towers around planets and take control over their orbits. Spin them with all you’ve attached! Collect new towers, powers and upgrades to beat the onslaught of goopers and save the galaxy in this colorful Tower Defense Roguelite!

Why similar: Tower Defense 28.8%, Real Time Tactics 23.4%, Tactical 10.7%, Space 8.2%, Strategy 7.8%

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 21.2%, Real Time Tactics 20.1%, War 11%, Space 10.3%, Building 8.8%

3D Real-time strategy attack enemy defense with upgradable summoned units. You play as Spirit Summoner to destroy modern human sophisticated defenses of a small city. Devise a masterful strategy that utilizes your summoned creatures to their fullest potential and breach their fortifications.

Why similar: Real Time Tactics 33.1%, Tower Defense 23.5%, Strategy 13%, War 11.4%, Tactical 8.1%

Build towers, shape enemy paths, and defend your outpost from endless waves. Survive escalating threats, destroy falling asteroid hazards, and push your defenses to their limits in Endless Mode.

Why similar: Tower Defense 28.8%, Real Time Tactics 20%, Building 11.4%, Strategy 8.2%, Sci-fi 8.1%

A strategic tower-defense where you control powerfull drones. Unlock new tower and use specific technologies to defend your base on Thukothea!

Why similar: Tower Defense 41.5%, Real Time Tactics 23.6%, Strategy 11.6%, War 7%, Tactical 6.4%

A Roguelike Tower Defense in space with missions to conquer. Can you hold against the spreading alien bosses? Build and upgrade towers against the corruption. Choose your technologies and warpspeed your way to victory.

Why similar: Tower Defense 26.7%, Real Time Tactics 25.8%, Building 9.8%, Strategy 9.4%, Space 9.2%

A strategic tower defense where your towers are the maze. Funnel enemies through fire, ice and lightning, spend your gold on stronger defenses or risk investing for bigger payouts, and unlock permanent upgrades to push further into endless waves.

Why similar: Tower Defense 30.9%, Real Time Tactics 26%, Strategy 11.5%, Tactical 9.6%, Resource Management 9.3%

A strategic space tower-defense game. Enemies detect, warn, and try to bypass defenses, forcing you to adapt. Combine diverse towers and face unique maps for varied battles. With tense sci-fi atmosphere, it delivers a fresh experience beyond traditional tower defense.

Why similar: Tower Defense 25.4%, Real Time Tactics 24.3%, War 11.6%, Space 11%, Strategy 8.7%

A fast paced modern warfare tower defense game where you build, upgrade, and customize defenses to repel a relentless enemy invasion. Unlock powerful skills and abilities, craft advanced ammunition, and gather resources directly on the battlefield to outmaneuver and outlast the enemy.

Why similar: Tower Defense 30.8%, Military 21.1%, War 16.9%, Strategy 10.2%, 3D 6.2%

This is a sci-fi strategy game featuring a Defense Mode focused on tower defense and an Attack Mode focused on combat. The game includes over 30 different buildings and units, all of which can be upgraded through entry editing to enhance their performance and firepower.

Why similar: Tower Defense 24.8%, Real Time Tactics 15.1%, Resource Management 8.8%, War 8.5%, Space 8.4%

Zihun: Three Kingdoms is a Chinese character merge game. Spell generals from their names, fuse lore combos, light up the Codex, and conquer a 20-minute run — bitter early, glorious late.

Why similar: Tower Defense 29.3%, Real Time Tactics 27%, Strategy 14.1%, Military 13.3%, War 9.3%

A real-time war of air defence and industry. Build the economy, bury it, and layer SAMs over what you cannot hide. Read a fading intel picture of the enemy base and aim every missile yourself. Break their will to fight before they break yours.

Why similar: Real Time Tactics 23.8%, Tower Defense 22.7%, Military 12.3%, War 9.8%, RTS 8.1%

City Defense is a tower defense game. The enemies decided to blitzkrieg and a small town turned out to be the line of attack. Build automatic turrets to destroy enemy equipment, pump them, and earn money for the victory over each enemy, because only with a sly strategy and cold mind you can win this battle.

Why similar: Tower Defense 30%, Real Time Tactics 21.3%, Military 13.2%, Strategy 12.2%, War 10.3%

Prepare to defend your land against endless waves of ants and other vicious invaders! Build and upgrade towers, unleash powerful abilities, and master your strategy through stages that start easy but grow brutally challenging.

Why similar: Tower Defense 35.4%, Real Time Tactics 23.9%, War 15.5%, Tactical 14.3%, Strategy 9.6%

Defend humanity in IRON GUARD: Salvation. Build and upgrade turrets, support your heroes, and personally join the fight with your drone’s firepower against relentless machines.

Why similar: Real Time Tactics 23.9%, Tower Defense 23.3%, Military 11.8%, Space 7.7%, RTS 6.8%

Defend your town from waves of relentless aliens overrunning the town. Build, upgrade, and strategically place defenses to stop the invasion before they destroy your town.

Why similar: Tower Defense 40.5%, Real Time Tactics 29.4%, Strategy 15%, Tactical 10.5%, Action 3.6%

Bulwark Tower Defense is a competitive team tower-defense: wall your lane with auto-fighting units to hold back the waves, then spend essence to send monsters that break your rivals' defenses. Grow your economy, upgrade a shared King, and outlast the enemy team across 1v1–4v4.

Why similar: Tower Defense 30.7%, Real Time Tactics 28.7%, Strategy 14.3%, War 9.6%, Colorful 6.7%

Build your towers, plan your efforts, watch out for changing paths and strike back against the alien invaders in this challenging tower defense game!

Why similar: Tower Defense 27.2%, Real Time Tactics 24.1%, War 11.8%, Tactical 9.7%, Sci-fi 7.8%

Rule the battlefield from orbit! Crystal Nexus: Alien Siege is a hybrid deckbuilding tower-defense game that puts you in charge of outposts on hostile alien planets. Look down on the battlefield from your space station and deploy towers, weapons, and buffs from the cards you’ve collected!

Why similar: Real Time Tactics 25.7%, Tower Defense 25.2%, War 14.5%, Space 12.1%, Strategy 7%

Race-based tower defense. Build your army, defend your king, and send waves at your rivals. Up to 8-player FFA, 2v2 & 4v4 teams, and singleplayer. Crossplay on Windows, Linux, macOS & Steam Deck.

Why similar: Tower Defense 31.9%, Real Time Tactics 26.8%, Strategy 12.1%, War 10.6%, Resource Management 7.8%

Hold the line in a neon sci-fi siege. Deploy and upgrade 15 distinct towers, expose every enemy's weakness, and survive 50 escalating waves and relentless boss assaults. Every threat has a counter — find it before your base falls.

Why similar: Tower Defense 33.2%, Real Time Tactics 31.7%, Strategy 11%, Sci-fi 10.2%, Space 8.1%

Take command of civil air defense under constant threat. Build radar networks, manage power and resources, and decide when to sound the sirens. Every choice has consequences. Hold your cities together as escalation turns survival into strategy.

Why similar: Real Time Tactics 31%, Strategy 12%, Tower Defense 11.3%, Military 11%, Resource Management 9.2%

Solder diodes, capacitors and other electronic components to defend your motherboard from waves of evil viruses!

Why similar: Tower Defense 42.2%, Real Time Tactics 19.6%, Strategy 17%, Tactical 13%, 3D 6.5%

Tau Cubis is a mazing tower defense game set in colorful sci-fi landscapes. Use your strategic skills to overcome numerous challenges and advance through the leaderboards.

Why similar: Tower Defense 31.8%, Strategy 14.7%, Real Time Tactics 13.3%, Space 12.2%, Sci-fi 8.8%

A dark medieval tower defense. Build walls, arrow towers, bombards, and a castle against 13 escalating enemy types across 8 maps. Adaptive music and economy reshape every run. 4 difficulty modes, 24 Steam achievements, cloud saves, first-class controller support.

Why similar: Real Time Tactics 41.1%, Tower Defense 35.7%, Strategy 15.9%, 3D 6.3%, Singleplayer 1%

Co-op and Single player Tower Defense genre.

Why similar: Tower Defense 40.1%, Real Time Tactics 36.6%, Strategy 13.3%, Building 7.3%, Military 1.2%

Are you prepared for a thrilling toy army tower defense adventure? Welcome to the Toy Shire! Battle diverse foes in various locations, defend your family, and repel foes from your area. Save the world by strengthening your defense with toy towers!

Why similar: Tower Defense 21%, Real Time Tactics 19.1%, Military 14%, War 11.1%, Tactical 8.6%

1931-1945,the chinese Tunnel Warfare. Customizable map WWII RTS simulation with player-designed tunnels, dynamic difficulty, and enemy AI. Base strategies and tech choices shape unique combat styles. Experience authentic WWII tactics, not fantasy.

Why similar: Tower Defense 26.5%, Real Time Tactics 24.5%, Strategy 13.6%, War 9.2%, RTS 8.6%

Defend your kingdom against legendary monsters. Place turrets strategically to block their path. Upgrade your defenses to fend off enemy hordes. Become the legendary guardian of the earth alone or in co-op!

Why similar: Tower Defense 26.9%, Real Time Tactics 25.1%, Strategy 9.6%, Building 9.5%, Tactical 8.9%

Build powerful defenses, collect loot, combine effects, and survive evolving waves from the void in a tower defense game driven by ARPG-inspired buildcrafting and persistent progression.

Why similar: Tower Defense 23.6%, Real Time Tactics 22.7%, Military 14%, War 12%, Strategy 7.7%

Build your towers according to the enmey you are facing in the wave. Upgrade your turrets to increase range, damage or rewards. Each enemy wave will be random and increases in speed and damage resistance. How far can you go!

Why similar: Tower Defense 36.6%, Real Time Tactics 25.9%, Sci-fi 10.9%, Military 9.9%, Strategy 9.3%

Star Ash Fleet is a groundbreaking real-time strategy game that transcends tradition. Set against a holographic 2D battlefield simulating interstellar warfare, players assume the role of a newly appointed Federal Fleet Commander, crafting their own war epic across the vast galaxy.

Why similar: Real Time Tactics 26.9%, War 15.2%, Space 13.9%, Military 10.8%, Sci-fi 8.8%

On an alien world, you must defend yourself in this unique base-building tower-defense game. Build a base by placing blocks, turrets and traps in order to survive the hoards of aliens.

Why similar: Tower Defense 31.3%, Real Time Tactics 19.3%, Strategy 11.1%, Resource Management 9%, Space 8.4%

A real time strategy, tower defense game where you can evolve your turrets and give them special abilities.

Why similar: Tower Defense 31.3%, Real Time Tactics 26.6%, Strategy 15.5%, War 9.7%, RTS 8.8%

Free demo available! A free-placement tower defense game with roguelite card upgrades. Redirect enemies, choose one of three upgrade cards, and buy upgrades and supplies at the Battlefield Shop. Shape your build and hold the line with overlapping fire.

Why similar: Tower Defense 28.2%, Real Time Tactics 27%, Military 14.9%, Resource Management 10.6%, Strategy 9.3%

Defend your base by placing towers strategically, forming interconnected systems that depend on one another. Adapt your strategy to different environments and enemy waves, exploiting their weaknesses. In System Status: SuperCritical, resources are scarce and critical failure is always an option.

Why similar: Tower Defense 31.7%, Real Time Tactics 25.2%, Space 14.8%, Strategy 12%, Tactical 4.3%

With a style inspired by the RTS games from early 2000's, a new tower defense combines in a unique way action, tactics, replay value and fun. They are here! Choose your targets, upgrade, replay, discover your enemies and your tactical skills.

Why similar: Tower Defense 28.9%, Real Time Tactics 27.1%, Military 15.9%, Strategy 8.1%, Tactical 7.3%

Your towers don't fire a single shot. You block the horde with the lines between them. Deploy the right towers and mix diverse line synergies to craft your winning strategy. Classic tower defense, completely reinvented. Test your tactical limits against escalating waves.

Why similar: Real Time Tactics 37.5%, Tower Defense 32.8%, Strategy 13.6%, Tactical 9%, Resource Management 6.3%

Space Nature Attack TD is a tower defense where you can level up and customize tower stats and elements to your liking! Fend off various types of alien creatures across many different sci-fi planet themed maps, biomes, and difficulties!

Why similar: Tower Defense 40.2%, Real Time Tactics 17.5%, Strategy 15.9%, Space 10.5%, Sci-fi 7.6%

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 41.4%, Real Time Tactics 13.7%, Strategy 11.4%, War 6.9%, Sci-fi 6.8%

ASSEMBLE AND COMMAND YOUR SPACE FLEET TO VICTORY

Why similar: Real Time Tactics 34%, Space 16.6%, Strategy 11.5%, Tower Defense 11.2%, War 10.2%

Build and upgrade towers, defend your fortress from the growing onslaught. With each wave, the challenges become more difficult, but a smart strategy and the right decisions will help you endure and prevail!

Why similar: Tower Defense 35.6%, Real Time Tactics 20.8%, Building 13.4%, Strategy 13.4%, Tactical 12.1%

Build towers and learn abilities to defend against swarms of hundreds of on-screen hostile alien creatures. Choose between sets of randomized upgrades that both upgrade you and the alien swarm. From enormous explosions to far-reaching flamethrowers, no two games are the same.

Why similar: Tower Defense 28.3%, Real Time Tactics 22%, Strategy 9.2%, Space 9%, Building 8.8%

Zero Zone 2020 is a classic Tower defense game where you will need to defend a home base from swarms of enemies

Why similar: Tower Defense 52.4%, Real Time Tactics 27.3%, Strategy 16.1%, Action 4.3%

Defend the clearance shelf. When the lights go out, the seasonal war begins. Lead your unsold Easter stock against waves of full-price enemies — before morning reveals the secret.

Why similar: Tower Defense 35.5%, Real Time Tactics 23%, Strategy 17.3%, Building 9.6%, Resource Management 6.7%

Negative Energy is a tower defense game with basic RTS mechanics, where your goal is to defend the construction of a Dyson sphere, while fighting against waves of hundreds of enemies ships.

Why similar: Tower Defense 29.6%, Real Time Tactics 25.6%, Strategy 14.2%, RTS 8.4%, Space 8.1%

Start with one tower. Kill monsters, earn Scrap, and spend it on more towers and better upgrades. An incremental tower defense where your fortress survives between assaults. Pause whenever you need to plan, then see how far you can push it. Prestige when you're ready to start again, stronger.

Why similar: Tower Defense 35.1%, Real Time Tactics 28.4%, Strategy 11.9%, Resource Management 10.7%, Tactical 9.4%