Top similar games like System Invaders:
System Invaders FREE
Experience waves upon waves of viruses that have infected your computer. 5 Chapters with over 125 Waves of enemies! Play with your friends in local or online co-op! Can you destroy all the viruses?
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Zombie Spree: The Dawn$0.99
Relax and shoot zombies in Zombie Spree: The Dawn - a static shooter with a variety of weaponry. Turn them into a pile of blood without the need to move around. Enjoy the perfect game for chilling after a tough day!
Cyberpulse$14.99
Slam your way through waves of viruses and hurl your friends through cyberspace in this flashy arcade thrower that combines classic twin-stick action with inventive physics for an electrifying adventure.
Greedland$10.99
"Greedland” is a roguelike game mixed with survivor-like elements. It's reminiscent of Crimsonland and Vampire Survivors, and as the battle progresses your character will become a mobile arsenal of destruction!
Mutation Madness$5.99
Welcome to the World of Mutation Madness, where chaos reigns, viruses evolve, and survival is the ultimate challenge!💥Defeat waves of mutating viruses and save Cell City from the Madvirus outbreak!🦠🔫 Upgrade your gun and use powerful items, while discovering virus intel!🧪
Sniper Ships: Shoot'em Up on Rails$1.99
Dodge bullets and click to destroy enemies with your sniper attack! This is a classic Shoot'em up mixed with Shooter on Rails mechanics! We challenge you to dodge all the shots and destroy all the enemies!
Hero Quest: Tower Conflict$1.99
Hero Quest is a Tower-battle in the most literal sense! Defeat waves of enemies as they attempt to overthrow your keep! Wisely deploy your units into the battlefield and use spells to destroy the enemy tower!
Pandemos$0.99
Pandemos: Embark on this dangerous and fun pixelated dystopia, where the Protectors defend the harmless Cells from a massive invasion of dangerous virus agents of unknown origin.
Alien Weapon Test Grounds$1.99
Alien weapons with unique physics await in this fast-paced FPS. Battle waves of enemies across diverse landscapes, lighting, and weather. Beware the unstable space-time continuum.
AQUA KITTY UDX$6.99
AQUA KITTY UDX blasts onto PC in this enhanced Ultra Deluxe Edition including the epic Dreadnought game mode!
J.A.W.SFREE
An RNG, dynamic and strategic FPS. Test your mettle against endless waves of super soldiers. How long can you last?
Metal Swarm Infinity$4.99
Enter an ever changing, randomly generated galaxy and battle the Metal Swarm menace in this arcade style shoot 'em up. Blast through hordes of bugs, collect powerups and battle giant bosses as you harvest their power cores to upgrade your ship.
Tybot Invasion: The Typing Runner$3.99
Type words quickly to destroy robots, move among lanes, and destroy all the enemy's waves on this invasion that mixes Typing & Run! The future of Robworld is in your hands, can you destroy all robots fast enough? Type for your life. Type for the future.
CyberHeroes Arena DX$4.99
Survive all the waves in this cybernetic auto battle rougelite. Customize your robot for unique combat and fun!
Sheriff Rage$4.99
Sheriff on guard for the defense of Oldstone city against extraterrestrial forces
Paper Flight - Super Speed Dash$9.99
Paper Flight – Super Speed Dash is an interactive game experience that is designed to ease your mind and have fun popping innocent balloons. You jump into the role of a little paper plane that is supposed to rescue the world from little but evil balloon demons by dashing through them.
Paper Flight - Speed Rush$9.99
Paper Flight – Speed Rush is an interactive game experience that is designed to ease your mind and have fun popping innocent balloons. You jump into the role of a little paper plane that is supposed to rescue the world from little but evil balloon demons by dashing through them.
Timeloop Titans$9.99
Timeloop Titans is a fast-paced space arcade shooter where you defend the breathtaking Planet Gaia from relentless alien invasions. Upgrade your ship, conquer challenges, and save humanity in this cosmic battle for survival!
Z-Warp$6.99
Z-Warp is an intense vertical shoot’em up presented in retro pixel art style, featuring frenetic arcade-inspired action where blasters, bombs and KILLER specials are your only allies.
Star Legacy VRFREE
Star Legacy VR is an immersive virtual reality shooting game that incorporates intriguing Roguelike elements into gameplay. Players assume the roles of interstellar guardians who venture across diverse planets and traverse through various time zones.
Hypt$4.99
Hypt is an action arcade game set in a dynamic world of villainous viruses. Turn the deadly digital infections against themselves and break free of the labyrinth that is Hypt! Featuring 120 immersive levels, Hypt will keep you entertained for hours.
Break my body$4.99
Break my body renews the breakout game genre with tiles to protect, a power to fill up and a paddle that can extend its reach with a repulsive cloud. In this medical breakout, you play professor Brick's assistant and try to treat a hopeless patient.
Survivor Cells$4.99
Discover the beauty and fragility of life in Survivor Cells, a unique survival game against viruses and bacteria, which strategically combines the elements of roguelite, bullet hell and tower defense in a challenging experience. Your destiny depends on your agility and choices. How far will you get?
PillPop - Match 3$2.99
PillPop, a unique style match 3 pop game. Battle colorful cute viruses with the medical pills to make them pop!
God Of Arrows VR$0.99
God of Arrows is a Virtual Reality tower defense game where you take the role of an archer defending a castle against the forces of evil with some help from the gods. Play solo to fight through endless waves of monsters and compete in an online leaderboard to showcase your skills as the best defender.
Super Virus Defense$3.99
Fight the virus in this fast paced arcade shooter with a dash of tower defense!
Doctor Nanobot$2.99
Small robot, big battles! Doctor Nanobot is a retro style arcade shooter where you take on bacteria, viruses and more using a variety of high tech medical weaponry!
Blink: RoguesFREE
An EXTREMELY DIFFICULT Shmup that will ruthlessly challenge your abilities by requiring extreme precision, top notch reflexes and solid enemy mapping. Engage in short and intense levels, switch battle direction, teleport between lanes, steal loot and combo your way to Victory!
Funny ArcheryFREE
In the role of a brave and clever soldier, your mission is to protect the wall from enemy attacks till your last breath with a bow as the main weapon. The enemies become increasingly dangerous through each wave, so you must keep focusing on each shot to ensure no enemy will pass through the wall.
Asteroid RKD$0.99
Asteroid RKD is a small arcade-like game in which you have to reach as high a score and survive as long as possible against increasingly difficult waves of Asteroids. Get power ups to upgrade your ship's firepower and protect yourself from a one hit death. Survive the asteroid field.
Razerwire:Nanowars$1.99
A modern revisitation of the 80s arcades. Use your Razerwire to cut through waves of nanobugs with a rogue-like inspired progression.
Star'Shoot$3.99
In this space shooter avenge the Earth destruction and destroy dozens of procedurally generated enemy waves ! Each death will make you stronger. Can you reach the top of the leaderboard ?
Sad Ghouls$4.99
Sad Ghouls is an arcade survival shooter. Kills increment the combo counter, Higher combo means better weapons which leads to more combo. Become a tool of destruction as you decimate endless forces of ghouls and compete with other player's highscores
Paper Flight - Beyond Time$9.99
Paper Flight – Beyond Time is an interactive game experience that is designed to ease your mind and have fun popping innocent balloons. You jump into the role of a little paper plane that is supposed to rescue the world from little but evil balloon demons by dashing through them.
Aura Shift$0.99
You're a chubby fairy and hordes of monsters are trying to eat you. In Aura Shift the psychedelic action never stops.
Alien Decimation$1.99
Destroy waves of UFOs in a arcade style space shooter with an array of powerful weaponry.
Damn Endless Orcs$1.99
Damn Endless Orcs is set in a medieval fantasy world, where human heroes battle relentlesly against an (you guessed it) endless horde of orcs. In this game you must survive and gather equipament to fight the horde and become earths mightiest hero.
GunDeck[100]$4.99
GunDeck[100] is a lightning-fast twin-stick shooter where you’ll build your arsenal from randomly-dealt cards. Weapons fire in a rainbow of elements with unique effects. Dart and dodge to survive the fireworks unleashed against you, and retaliate with your own display! Can YOU survive to wave 100?
Soulbaby: Remastered$15.99
An original roguelite experience combining bullet-hell and traditional, turn-based RPG elements. As a newfound hero, endure countless waves of enemies as you shape your identity, increasing performance attributes and learning new skills, on a journey to uncover the mystery of a fading cosmos.
Coastal Defense$1.99
Coastal Defense is a fast paced, casual top-down tower defense game inspired by real-world coastal defense structures. Buy and upgrade your coastal defenses to defeat incoming navies!
Customers From Hell - Game For Retail Workers (Zombie Survival Game)$7.99
Third-person wave survival shooter where you protect your base, and eliminate annoying Karens that want to speak to the manager. Protect your supplies, build traps and construct your defenses. Eliminate all the annoying customers! This is your chance to get back at Karens for old' times sake.
Defenders: Survival and Tower Defense$4.99
Defenders: Survival and Tower Defense is a Cooperative First Person Shooter that redefines the tower defense genre. Team up with friends, drop in to a variety of diverse maps, and defend The Core from waves of hostiles with a unique arsenal of upgradable weapons and towers!
Bug Killers$1.99
Bug Killers – is a dynamic Top Down shooter where you will need to turn crowds of bugs-mutants into meat. The game has three modes: Survival, PvP and PvE. Different types of armament will help you to effectively destroy the enemies.
Scorpion Overdrive$0.99
Descend to an alien planet where you will steal the planets most valuable resource, while hordes of giant alien bugs sting, stab, claw and shock you to no end. You must hold them back from destroying the equipment and somehow stay alive to enjoy a nice payday.
Run Build Pew!$2.99
You’re being Bounty-Hunted! Run, Build your ship piece-by-piece and make it work with the parts you find, Destroy outposts and waves of fleets, and Pick your battles carefully to overcome your hunters in this Fast-Paced Top-Down Action Roguelite Shooter.
Coronator$0.99
because we all should stay at home.
Impact Trial: First Encounter$4.99
Impact Trial: First Encounter is a exciting mix of bullet hell and narrative adventure in a retro sci-fi world. Face waves of enemies, make story-affecting decisions, challenge yourself with various difficulty levels... and more secrets. ¡Your story, Your choices!
Doomed Brigade$2.99
Doomed Brigade is a survival game where you pilot a spaceship, battling hordes of enemies from three different alien races. Level up during each game, unlocking upgrades, modules, and diverse ammunition to equip yourself and crush your foes.
Psycho Starship Rampage$9.99
You play the psychotic A.I. of a warship lost in space which tries to come back to Earth. Build your spaceship from scratch. Load it with weapons. And use your creation to destroy waves of innocent aliens throughout numerous levels. Loot their carcasses, extend your ship and jump to the next sector for more action!
Fatal TheoryFREE
Fatal Theory is nostalgic beat-em-up action with a fresh twist of ENDLESS AERIAL RAVE COMBOS and a killer illustrated story. Exercise your carnage muscle by smashing through huge hordes of unlovable fiends and take your crummy city back from the forces of hell!
ARMED FORCES OF UKRAINE game$0.99
AFU game offers you to take on the role of a soldier of the Armed Forces of Ukraine and try yourself in a performance of various missions with a plot. Starting with a banal base defense, to the destruction of the legendary orc`s cruiser.
Seacurity Breach$9.99
Seacurity Breach is a 3D tower defense game with a twist! We embrace verticality, ragdoll effects and a unique unit design. Expand gameplay experience by creating a level yourself or test your skills against a multitude of fan-created maps. Join Aerian forces to repel Aquator invasion!