Top similar games like Save Our Solar System:

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.

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!

Totally Defenceless is a wave-based tower defence game. You will need to protect your energy cores from the invading alien bugs by strategically constructing a maze of towers to alter their path to your advantage.

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!

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

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.

Threats To Humanity: The full version of this game with feature 10 unlockable level, New upgrade system and power ups, High score and leaderboard, New turrets to unlock, new enemies and bosses battles. Future DLCs for more levels, turret, and more.

Desperate Place is a strategic tower defense game where you play as a crew member who wakes up early on a damaged colonization starship. Stranded on an unknown planet, you must gather resources, repair the ship, and defend against alien monsters to survive and escape.

Remember the golden age of arcades playing a game with all the classic 80's/90's space-shooting features. See how far you can go by destroying all enemy robots that are ready to planet earth attack.

Faith & Shield: 4044 Tower Defense game, where you protect the human settlement from the incoming invaders, robots and other creatures, never seen before on our planet.

Dracomaton is a top-down roguelike bullet hell about Eclipse, a small robot who awakens in an abandoned factory filled with corrupted training bots and the secrets of cosmic dragons. Fight your way to the top of the tower by transforming your robot body, changing your entire arsenal on the fly!

Scrap Bastion is a strategy tower defense game where you manage your city, equipping it to survive the waves of mutant creatures, testing your planning and decision making capacities at every turn. Watch out, as time is crucial to win!

XenoFeud is an insane top-down twin-stick arcade alien shooter, where you must survive hordes of alien intruders while defending a mysterious object in space.

Galacticon is a video game with the look and feel of arcade cabinet games from the early 80's in the style of Williams classics: "Defender" or "Joust", with the gameplay of legendary "Jetpac", and with touches of "puzzle".

"SYNCHRONIZERS: Undead Marines" blends high-quality Three-Lane Tower Defense with Reverse Tower Defense gameplay. Command dynamic units in a thrilling narrative reminiscent of a StarCraft and Plants Vs. Zombies fusion! Your choices will forge the path to victory—or defeat.

Brutal, high action, randomized run n gun blast a thon.

Soda Sabotage is a Sci-fi 2D top-down shooter, where the player guns his way through 25 levels and 5 bosses belonging to a soda weapon factory using their own weapons against in order to disable the evil soda weapon making factory. Shoot, dash but most importantly survive!

This is a 2D science fiction casual game, where players can gain increasingly fulfillment by collecting and exploring in the universe. The non-competitive game mode can also bring relaxation to users.

Mineral Defense combines tower defense with roguelite elements and procedural generation. Build paths, unlock upgrades, and unleash powerful synergies to conquer evolving challenges in an ever-expanding world.

ZPF is a retro-inspired horizontal shooter for the Sega Genesis/Mega Drive. Blast your way through a cosmic gauntlet of epic boss battles, addictive scoring, and hidden secrets in a thrilling arcade-style adventure through fantasy, sci-fi, and alien-themed worlds.

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?

Alpha One is a top-down action, 4X-lite strategy game. Each action level is a turn in a strategic conflict as you race to collect resources, acquire upgrades, expand territory and build defenses. All to find a way home!

A sci-fi action strategy tower defense digging 2D top down game, Dig, explore, build production and defensive facilities, take care of robot's battery and manage power wisely..

Star Trek: Prelude is a space-based game that builds defense towers on earth to defend against alien invaders called Black Ember.

A spaceship building and universe-exploration game. Collect resources, expand and grow your fleet, and conquer your personal galaxy. Stellar ambience by Peaks.

From the creators of AI War: Fleet Command comes an all-new grand strategy title with turn-based tactical combat, set in a deep simulation of an entire solar system and its billions of inhabitants. You are the last of a murdered race, determined to unify or destroy the 8 others.

Cosmic Stronghold is a mix of the genres RTS and Tower Defense. Your primary goal is to keep your space station alive for as long as possible, so that it can harvest the nearby mines for precious mineral ores. You will be faced with waves of enemies, getting stronger and stronger for each wave.

Doomsday clock ticks 5 minutes to midnight, unravel the tale of a nuclear disaster's genesis. Dive into chaos blending humor and horror, setting the stage for strategic battles. Crafted by a dedicated team, this prologue teases the reborn classic RTS with laughs and chills!

Gear up and get going! Defend your outposts from waves of alien enemies with your mech. Build and upgrade your base, protecting the extraction of the mysterious planetary system’s rich resources!

ElectraPlanet is a Multiplayer Adventure/Survival game. Exploring to find resources and later on, build an empire to protect and produce electricity as much as you can! With that electricity become the king of your planet!

Defend your AI capital against endless alien invasions in this space shmup-inspired tower defense with roguelite randomness. Dissect bodies and ships to unlock weirdly powerful tech. Upgrade your base with turrets, turning your screen into a symphony of perfect destruction!

Defeat enemies and get parts! Build your own spaceship!

2D space shooter and turret defense come together to create the Planetary Defense System this world needs! Shoot down asteroids and aliens and survive the bosses in this arcade like game featuring customizable satellites, projectiles, and upgradable Cannon and Planet Shield systems.

Mow down the alien hordes, scout for resources and survive. Dreadnought is a mix of Action Tower Defense Survival and Shoot 'Em Up Bullet Hell where you control the ships turrets & defend against waves of enemies. Choose your weapons, upgrade your ship & brace yourself, the horde is coming.

Blast your way through waves of space debris in order to reach what is waiting for you on the other side. Find your fighting style with multiple unlockable ships in this fast paced space adventure!