Top similar games like Crystal Nexus: Alien Siege:

"SYNCHRONIZERS: Undead Marines" is a high-quality three-lane Tower Defense and Reverse Tower Defense game for a single player initially (and online coop in a near future) for Windows. This feels like the perfect mixture of StarCraft with Plants Vs. Zombies!

Classic RTS gameplay fused with a modern roguelike. Shape your build each run by assembling an evolving arsenal of powerful units and facilities. Harvest resources, build out your base. Raise your army and call down powerful strikes to overcome the forces threatening your survival.

A sci-fi roomscale VR Tower Defense game. Strategize to destroy waves of rogue robots and assist the powerful turrets with a handheld drone. Build and collect resources and help evacuate your crew from the alien planet.

Chaotic Era is a fast-paced, grimdark action RTS, following a stranded human crew on an alien planet. Fight back against alien hordes in a frantic real-time strategy nightmare inspired by StarCraft, Alien, Starship Troopers, and more.

Join our machine legion to conquer the world.

Sphere Invasion is Sci-Fi Tower Defence. Build your own road and defend it with 7 unique towers.

Mini Continental Saga is a biotope strategy history card game letting you freely stir small worlds! Human, elf, slime? Or lead your fishman to create your favorite fictional world! One play takes 5 to 30 minutes. Weave a tale that you've seen somewhere before, but doesn't exist anywhere else!!!!

How many tries will it take to get back our land? Enter the Kernel - defense simulation to protect the Wirelands. Fight roguelike strategic Tower Defense battles. Upgrade and customize your Turret deck with unique synergies and countless combinations. Do you have what it takes to reach the end?

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.

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!

Play cards in real-time in this action-packed deckbuilding horde survival roguelike. Forge a deck, lead your squad, and defend the harvester in intense battles across enemy-infested planets. Unlock Ascension Levels to face rising challenges with incremental content and balance changes.

Defend entire planets against hostile invaders in this full 3D tower defense game. Manage resources and space while constructing weapons, defenses, and structures to withstand the destructive onslaught across multiple planets.

A sci-fi Tower Defense game. Strategize to destroy waves of rogue robots and assist the powerful turrets with player controlled drone. Build and collect resources and help evacuate your crew from the alien planet.

The Creeper always returns... but this time, we have the advantage! Explore new worlds where the creeper, sand, and particles all merge in a pixel level simulation pushing the bounds of real time strategy into new territory.

Zero-Point is a 3D space roguelike inspired by the indie hit FTL: Faster Than Light. Take control of a cruiser with up to 4 starting crew members and travel through many regions of hostile space on your mission to save the Star Federation from the rebellious Galactic Liberation Front.

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.

Have you ever been in a robbery and didn't have weapons to defend yourself and your house? Well now you can, with hold your houses you have a variety of weapons to use to help you defend yourself, your house and take on those unwanted robbers.

EARTHLESS is a sci-fi, roguelike deckbuilder where humankind has been thrust into the cosmic wind on a fleet of starships captained by you. To find a new home, you must draw your own path through the stars and play the hand you’re dealt. You are our hope in the darkness.

Millennium Conflict: a real-time strategy game set in space where you must act fast to stop attackers from conquering your universe. With 40 levels, weapon upgrades, and new generals to recruit, it's up to you as the only surviving male to lead your troops to victory.

Reign supreme in a world of walls and spells. Discover powerful strategies and outsmart your rivals with cunning tactics to rise through the ranks and become the one true Wallstar!

There’s more than one proper way to use a piano! Discover it in Ridiculous Catapult Simulator, a wacky deck-building experience. Launch insanely dull daily-life ammo to create insanely smart combos and bombard silly enemies coming to lick your castle to death. Careful, it’s addictive!

You believed tower defense is only about building towers? That's not quite right – because AIRA VR is not like other tower defense games in virtual reality. Once the battle starts you find yourself in the midst of the fight!

SENTRY is an action-defense first person shooter where you defend your spaceship against a relentless alien threat. Use traps, turrets and environmental destruction to repel invading hordes and engage the enemy in fast-paced FPS action across a dynamic campaign.

In Space Empires: Starfury you are on a wild intergalactic ride through the Space Empires universe. You are an undercover agent for the TCN (Terran Confederation Navy) trying to determine the cause of a recent escalation of pirate attacks in the Neutral territories.

"Galactic Defense: Automation" is a real-time strategy game that emphasizes unit behavior automation. All units run their own cycles: production, development, death, and recycling. Players design construction plans to defend and destroy enemies.

Take command of the mech and become the ultimate strategist. Construct impregnable defense facilities, handpick potent skills, lead your troops, and defy relentless enemy assaults. Will you emerge victorious in this thrilling battle for supremacy?

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!

Volition's classic is back. Descent: FreeSpace is the quintessential old school space shooter. With a deep story, great graphics and engaging battles against fighters to capital ships it keeps you moving. Breakout that flight stick and enroll with the Grand Terran Alliance today.

Invade strange worlds with alien armies! populate and shield your planets! Assassinate, Sabotage and Nuke your opponents! Collect victory points and achieve... PLANETARY CONTROL!

Join in on the next gold rush and become a prospector in space. In this unique tower defense you can set up and reposition towers for maximum efficiency and adapt to the environment.

Defeat enemies and get parts! Build your own spaceship!

Tower of Cards is a deck building tower defense game.

You control a space station in the form of a cube that protects the planet from invaders.

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?

A dynamic tower defense/deck-building game with roguelite mechanics! Build towers, protect your pyramids, and create your own strategy. Drafting towers is an addictive real time strategy game.