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?
Filters
Price (USD)
Release Date
Recommendations
Paper Planets$0.99
Paper Planets is a retro style rogue-like space shooter. Players fight as long as they can, then upgrade their ship and try again.
Survivor Company$4.99
Survive waves of WWII enemies with your squad in this 2.5D roguelike. Use support & assault cards to amp firepower. Time's ticking, make your stand!
Limelight$1.99
Cast various lights on your enemies to destroy them, conquer 40 randomly generated dungeons in Story Mode or play endlessly in Survival. With the help of hats and powerups, for sure!
Astervoid 2000$4.99
Astervoid 2000 is a 1 to 4 player local-multiplayer space brawler, combining classic arcade action with modern gameplay. Explosive, indestructible, and icy asteroids will slam against your ship, or can be weaponized against your opponents. Perfect support for gamepads & keyboard and mouse.
Galactoids - Galactic Invaders$9.99
Battle swarms of Galactic Invaders in this action-packed retro-inspired arcade shoot em up. May the Nerd be with you.
Ring Runner: Flight of the Sages$4.99
Ring Runner combines the fast-paced action of space combat with the rich story and skill variety of an RPG.Trek across the universe in a 30 hour long story-driven campaign based on a companion Sci Fi novel, or challenge 6 scenarios alone, cooperatively, or competitively through local or online multiplayer.
Radar Warfare$0.99
Radar Warfare is a bullet hell/fast paced arcade shoot 'em up with radar theme and retro style. 27 stages will challenge you with different waves and enemies. How long can you survive?
Catamyst$4.99
Catamyst is an Action Roguelike that fuses science and magic to craft potions and throw them at hordes of enemies that threaten the natural world.
Bounty of One$6.99
Fallen hero of the Wild West, you’re wanted and in disgrace! Grab your guns, survive endless hordes of bounty hunters and fight to clear your name! Bounty of One is a fast-paced casual roguelite bullet hell for 1 to 4 players. Dash, Dodge, Shoot, Repeat!
Anti Air$12.99
Are you the new recruit? Well, grab your weapons and descent into battle on distant planets. There you will combat the Alien invasion called the Cubicon Conjunction. Waves will hit you so you better blast these invaders from the sky before they crash onto your base.How many will you take down?
Neon Ships: The Type'em Up Shooter$3.99
Shoot enemies while typing pop culture phrases to destroy enemies with your special laser attack! This is a classic Shoot'em up game with a typing twist! We challenge you to dodge all the shots and destroy all the enemies!
Dead Streets: Zombie Blitz$4.99
Dive into the adrenaline-pumping action of Dead Streets: Zombie Blitz, where the fate of the city rests in your hands! This action-packed shooter throws you into a city overrun by the undead, transforming every corner into a battle for survival.
Space Aliens Invaders$3.99
modernized old time classic alien shooter game
Gooblins$3.99
Save yourself from waves of Gooblins! Though appearing cute and cuddly, these creatures are determined to scatter your remains into space with plasma, fireballs, or kamikaze attacks. Survive the onslaught while killing Gooblins in color combos to rack up points and climb the leaderboard!
Shoot The Zombirds VR$4.99
Shoot The Zombirds VR is a gallery shooter starring undead birds, pumpkins and a crossbow. Excellent shooting fun for all skill levels.
Enemy Mind$9.99
A retro shooter with a new power: the power to become any ship.Lost in the depths of space, you are a being of pure psychic energy with the uncanny power to take over and control anything you see in order to survive.Built for PC, Enemy Mind lets you battle your way through 70+ waves of challenging enemies.
Overrun$2.99
Fight through immense waves of enemies and test yourself in this difficult, top-down shooter. Swap between short and long-range weapons to tackle any situation. Unlock and upgrade dozens of weapon combinations to customize your loadout. How long can you survive before you get OVERRUN!
Special Warfare - 特战之王$2.99
Special Warfare is a modern warfare multiplayer online FPS indie game developed by Battle Fire Studio, beautiful picture effect, 6 camps (Delta Force, Mercenary, SEAL, Army, SWAT, Terrorists）, zombie mode, you can use the weapon in your hand to kill the zombie army infected by biochemical virus.
Gamma Blast$0.99
Blast your way through enemy waves. Strike at enemy formations prioritizing targets depending on the situation. Rip them to pieces using an arsenal of powerful and versatile weapons. Put your reflexes to the test dodging a fire storm of enemy projectiles. Destroy challenging Bosses to achieve victory.
Skies Above$11.99
A fast-paced, action-packed pixel art game, where you have to help a Leviathan to reach space by defending it from an endless robot army.
CastleStorm$9.99
Welcome to the world of CastleStorm, a super genre mashup of 2D physics destruction mashed with tower defense brawler! CastleStorm was born out of the fond childhood memory of building and destroying LEGO castles.
Space War: Infinity$1.99
A semi-procedural shoot-'em-up that will test your skills. Level up your ship, unlock amazing weapons, and defeat 5 formidable bosses. Challenge the infinite by facing real-time waves of enemies after completing all missions. Become the intergalactic hero now!
Racket: Nx$19.99
Racquetball meets Breakout inside a giant pinball machine! Racket: Nx is a new kind of game that challenges the limits of what you can do with a racket and ball in VR.
Virus Madness - Dungeons of your Body$0.99
Fight your way through vicious viruses, bacterias to save all humanity in this cute shooter game. Advance through dungeons of your body and destroy them all
Game Soup$2.99
Master a collection of 46 challenging minigames, including parodies of famous games! Each game lasts just seconds, so act fast!
CryptoZoo$0.99
It's a fun game. It's a really fun game.
Mystic Space$1.49
A fast-paced high action game where you encounter deadly enemies with unique abilities through various waves.
Impeachment Survivors$2.99
Survive the Impeachment! Impeachment Survivors is a political parody action roguelike with many waves of enemies, upgrades, and comedy. Be hypocrite, be corrupt, be a politician!
Casual Pixel WarriorFREE
Survive the waves! Buy weapons and ammo! Unlock new stages! Purchase companions! Solve daily quests and get rewards! Casual Pixel Warrior is a wave shooter where your endurance to last an infinite fight depends on your skill, unlocked weapons and purchased ammo.
Warp Glider$0.99
Pilot a gravity-defying craft at blazing speeds. Pull off aerial acrobats using stackable weapons to survive the swarming Bandits. Retro arcade action and out of this world flight control! Now with Co-op!
Reign of Bullets$9.99
Reign of Bullets is a shoot ‘em up with epic loot and lots of guns. Upgrade your ship and customize your weapons to build the ultimate fighter plane.
Regular Spacecraft - Defending the Mothership$0.99
Defeat the enemies. Upgrade the spacecraft. Defend the mothership. Regular Spacecraft - Defending the Mothership is a shoot em'up game with roguelite elements.
All Guns On Deck$12.99
All Guns On Deck is a naval strategy, real time tactics action rpg with a unique battle system and unforgiving world to conquer.
Cosmo Chaser$4.99
Cosmo Chaser is space fighter action game which presents restless shooting battle. It demonstrates new style of vertical scroll shooter by presenting classic arcade action in 3D space.
LunarseaFREE
Action on the High Seas with casual gaming on a physics-based PC and mobile platform.
Drive to Hell$4.99
Drive to Hell is an action-packed shooter where you'll take a ride through an army of monsters to exact revenge on the Demon King for destroying your favorite dive bar. Enemies assault from all sides, each with its own special personality and attack style.
Deadly 30$4.99
Can you survive the horror? … a retro-style survival horror game developed by the two-man indie team of Gonzossm and Iggy Zuk. Survive 30 days and nights in a zombie-infested world by recruiting companions, upgrading weaponry and fortifying your position.
The Legend of Cyber Cowboy$4.99
Liberate a town from gangs of cybernetic bandits! The Legend of Cyber Cowboy is a top-down twin-stick shooter presented in slick pixel art style.
Hyperspace Dogfights$9.99
Hyperspace Dogfights is a juicy jet-combat roguelite in which you blast, dodge and slice your way through masses of technologically inferior baddies. Your jet evolves differently on each run and becomes stronger and weirder by gathering some of the 300+ available items.
Stardust VR$8.99
Stardust is a VR action-relaxation game inspired by the classic Space Invaders arcade set in relaxing and charming world with Binaural 3d sound. Play solo, co-op, or PvP with a friend as you shoot, dodge, and create black-holes along your way to the top of the world leaderboard.
Vektor Z$6.99
Vektor Z brings fast and furious retro space blasting action to Steam! Blast your way through endless waves of asteroids and enemies to write your name among the stars! Vektor Z offers a rogue-like arcade action game where you'll improve your progress every time you play!
Prison Chainball Massacre$1.99
Prison Chainball Massacre is a fast paced, mindless arcade brawler set in a prison arena where your only weapon is the Chainball.
Blurple Food Wars$4.99
Return to classic 80s shooters while fighting off the fast food horde in this retro space shooter.
Death Ray Manta SE$4.99
Death Ray Manta is an arcade game where you shoot lasers to kill bad guys, flash lights at yourself and move to the next screen to do it all over again. Sorry, no T-Rex.
Gravity Waves$4.99
Gravity Waves is a twin stick shoot 'em up in space with waves of enemies and realistic gravity to provide constantly changing gameplay.
SplashFREE
Splash is a fast-paced arcade-style game where you try to withstand waves of enemies and rack up a highscore bigger than all of your friends. All while listening to a killer 80s synth-soundtrack by legendary Koto.
Cubint$2.99
Cubint is a shooter roguelite where you go against a horde of enemies. Use Ally Shooting Turrets to your advantage. Upgrade different Buffs and unlock various Synergies to get stronger. Get powerful Spells that enable tons of new builds.
Small People Defense$4.99
Use projectile-based towers, unique tower interactions, and overpowered weapons to strategically conquer the endless waves in this 3rd-person tower defense game!
PuPaiPo Space Deluxe$4.99
Hop into your spaceship and battle waves of opponents in your journey to find the legendary space pizza! Now 100% more Deluxe than ever!
360 No Scope!$4.99
360 No Scope is a fast pace shooter that requires skill and accuracy. Take the fun and chaos of insta-gib with the only way to get ammo is by doing a 360, plus ability to run on walls, ceilings, and you get a fun chaos deathmatch experience.
Battle Waves: Card Tactics$5.99
A fast-paced Card Battler with Tower Defense action! Claim victory in the Roguelite Deckbuilder campaign and Online Multiplayer. Collect all the factions to explore thousands of strategic combinations.