Top similar games like Galactic Frontiers - Defense Protocol:

Element is a realtime strategy space game for people who don't have time to play realtime strategy space games. Generate energy, mine element, build attack and defence units, and destroy the enemy while maintaining a balance between earth, air and water.

The creeper is flowing through canyons to your base while you rush to build a space station in 3D by sending packets to your building foundations and pushing the fluid back with your weapons, eventually capturing the sources of the enemy or being drowned by it.

After a series of apocalyptic climate events, Earth is now under attack by a legion of penis shaped aliens who seek to wipeout what remains of the human race. Defend what is left of mankind's most iconic landmarks in this fast-paced crazy Tower Defense game.

Join our machine legion to conquer the world.

"Times Of War" - A sci-fi tower defense strategy game with armored vehicles, tanks, choppers, planes, explosive action, and a lot of unique environments. Upgrade towers, earn Tech points, manage resources, and defend your base in epic battles. Get ready for intense warfare!

It's a tower defense game that uses blocks to build fortresses against monsters. Gathering resources, building defenses, and keeping an eye out for the abilities of a variety of monsters.All of these will challenge the player's strategic choices, resource management, and immediate reactions.

2089 - Space Divided is a classic science fiction real-time strategy game in which you collect resources, build up your base, train troops and destroy your opponents with tactical skill.

Electromaze Defense is a classic tower defense game where you create your own maze. With a wide variety of maps, towers and upgrades, Electromaze Defense will keep you hooked for hours on end! Can you build the perfect maze?

Grimstar is a real-time strategy game with a story-based single-player campaign. Your brother's sudden death has hit you hard, but the laws of the corporation for which he laid down his life dictate that you must take his place until his contract is fulfilled...

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?

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.

This is a prologue for the main game Grimstar - a single-player real-time strategy game with a story-driven campaign. The sudden death of your brother has hit you hard. However, the corporation for which he has sacrificed his life requires you to take his place until his contract is fulfilled...

Cozy tower defense meets stylistic futuristic steampunk. Manage resources, buildings & towers. Unlock perks to further specialize yourself. Plan your defense & survive all enemy waves.

Toy Empires is a unique fast-paced, micro-management-free real-time strategy game. All you have to do is make the purest decisions and games!

Protect your inbox from spam to find a message from your crush. A Tower Defense game with new mechanics in virtual setting about online dating.

Starfend: place defenses strategically, upgrade and combine them. Protect planet orbits with your fleet. Face hordes of malevolent meteors in endless 3D levels. Strategy, action and exciting space adventure!

A tower defense game mixed with a little luck. A horde of angry zombies is approaching, bombs have been placed but they will only explode in ten minutes, until then you need to defend the objective with what you have and what you have.

A classic tower defense game with ordinary graphics didn't fascinate you? Well, let's give a try and see how long you can defend! Show your commanding skills and prove no enemy can break your defense! Be a hero and save humanity with the LAST DEFENSE!

Lead the operations of an artificial intelligence program with only one aim – to clear the Earth from the remains of humanity. Conquer the world campaigning on a single-player dynamic battleground or play with your friends during a real time strategic gameplay.

Stop an endless hoard of crystal-type enemies, with different attributes, from reaching the portal to earth! You can build your own labyrinths, unlock new turrets, upgrade them, unlock abilities, and also gather permanent bonuses.

Tower Defense Sudden Attack is a strategy game set in a military base seized by many terrorists and now is under attack.

Roman Conquest: Rise to Power is a turn-based strategy game in which the player can feel like a great commander of the Roman Empire. Lead a legion and go with your army to recapture the occupied lands.

The Evolution of War game shows the evolution of warfare in 5 ages, starting with the age of dinosaurs, crusades, medieval, 21st century (present time) and futuristic (fiction).The game's main objective is to destroy the enemy base.

The day has come… Humanity has been attacked by an alien race.You have space bases at your disposal. Use them to launch battleships and take over the alien mothership.

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.

A tower defense game that will bring challenge and many hours of fun. Get ready for battle in this amazing naval-themed game.

Rogue Door Defense is a tower defense mazing game with rogue-lite elements. Choose a door, defeat the enemies behind it and claim your unique reward. Build and upgrade different towers. Design your own maze to defend your lives against the attacking waves of monsters and powerful bosses.

Build up your defenses and ward off any threats to your expedition in this rogue-like tower defense game. Manage your resources well and make sure no to overstay your welcome on this planet, or be prepared to face a never-ending onslaught of crustaceans...

This is a strategic tower defense game, unlike traditional tower defense, you can control girls and use special protagonist skills in battles.

In Dawn of Anarchy, your skills, determination, and combat prowess will be put to the ultimate test. Will you be the hero the world needs to quell the uprising and bring an end to mechanical tyranny? Prepare for the battle of a lifetime amidst the dawn of anarchy.

Tower defense that will make you think

Wonder Defense: Chapter Earth is a strategy game based on Earth and Aliens in which you act as a General to accomplish survive and move to Mars.

Manny TD is a hybrid tower defense and third-person shooter with random in game elements. Join and get your personal high score!

Lead through an action-packed fast-paced tower defense game with a story of an invasion on your homeland by a large foreign force and as a newly appointed commander do what you can to help your country fight back and defend against this enemy force which is approaching from the coast.

Operation: Polygon Storm is the ultimate tug-of-war strategy game. Capture the enemy base by mixing different builds, fielding unique soldiers and experiment with a huge variety of Killstreak rewards. Compose the best army, overwhelm your enemy!

Command antique WWI Toy Soldiers in the trench-filled battlefields of Europe. Deploy an exciting arsenal of guns, artillery, flamethrowers, tanks and planes to defend your WWI toy dioramas.  Take direct control of individual units or command the entire battlefield from above.