Top similar games like Risk System:

Aqua Kitty is a fast paced retro styled submarine arcade shooter with optional 2 player local Co-op.Blast through hordes of mechanical sea monsters in your kitty sub and defend the deep sea milk mining kittens!THE MILK MUST FLOW!

Super Galaxy Squadron is a fast-paced vertical shooter designed for human beings as well as SHMUP veterans. Featuring multiple game modes, a challenging but merciful difficulty curve, forgiving health system, and SEVENTEEN playable ships.

The year is 2051. Location: SATAZIUS, a long-abandoned planet. The cruiser Agano was on patrol when it was attacked and stricken by a confederacy of space pirates that had established a base on SATAZIUS. The pirates attacked the Agano intending to steal the assault ship ‘Trafalgar’ that was stowed aboard the Agano, but the Trafalgar made...

The skies will be set aflame and the seas will overflow with wreckage in Vlambeer’s stylish arcade shooter LUFTRAUSERS! Select from over 125 combinations of weapons, bodies, and propulsion systems and take to the skies to battle enemy fighter planes, battleships, submarines, and rival aces for glory, honor, and high scores.

Super Hydorah is a nonlinear horizontal shoot’ em up designed to offer a challenging experience, sublimating the richness of traditional shmup classics. Face the menace of the Meroptians aboard the Delta Lance, alone or with your friends in this game with direct action and nostalgic art.

1917 - The Alien Invasions is a bullet hell memorization shooter. Dr. Brunhild Stahlmüller upgrades an WW1 Triplane with superior alien technology to attack the invaders. She will avenge mankind and take the battle into the darkness of space until she reach an ancient alien world.

In Blazing Chrome, bring your best pal and kick some metal butts to free the humankind while enjoying a classic run’n’gun, fully loaded with action and exciting fights!

Jamestown: Legend Of The Lost Colony is a neo-classical top-down shooter for up to 4 players, set on 17th-century British Colonial Mars. It features all the intensity, depth, and lovingly handcrafted pixels of a classic arcade shooter, with a modern twist: deeply-integrated cooperative gameplay.

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.

Saviors brings the best bullet hell experience you can find on Steam. Play through 18 challenging stages in this ultimate test of tactics and reflexes.

Fight, fly, flourish! BLUE REVOLVER is a manic arcade-style shoot-em-up built for newcomers and psychos alike. Powerful special weapons cut through tough areas, while an adaptive difficulty system tailors the game to your skill level as you evade and counter a maniac environmental force!

You play an explorer stranded on a dangerous alien planet. Low on fuel, your only hope for escape is to find the planet’s core in this incredibly clever action-puzzle-platformer.

Shoot different types of spaceships while avoiding getting shot yourself. Kill 10 minutes at a time with this affordable colourful timewaster.

Start a Rebellion! Lead your ships to take down the evil O'Xelg base in this squad-based shoot-em-up!

Star of Providence is a top down action shooter with procedurally generated elements. Explore a large, abandoned facility in search of incredible power, fighting dangerous foes and gaining new weapons and upgrades as you progress.

Remedy, a recent graduate from the Saturnian healing school, must descend to Hurtland and use her powers to heal everyone from stray ducks to dark lords, and finally cure the ailing Prince Hingst. It's a short, whimsical adventure with plenty of heart(s).

A huge hand-crafted world packed with 13 unique bosses, a gripping story, and tons of enemies, Spaceport Hope is the ultimate test of gaming prowess.

Ultionus is a love-letter to the home computer arcade games of the late 80s and early 90s, with colorful 2D visuals, catchy chiptune music by the legendary Jake 'Virt' Kaufman, and 7 stages of hard-as-nails gameplay.

Wryn is a girl with a big arsenal and big dreams -- she wants to be the ultimate videogame hero! Help her take down the Greatest Heroes of All Time in an action-packed bid to claim the title for herself and show the world what a true hero looks like!

Craft your arsenal to avenge your fallen comrades and save the world from the fearsome forces of CLAW!

This is your next great opportunity to dive into 16-bit classic consoles era and master your play-skill. Zeon 25 is an amazing 2D Shoot’Em Up experience with 90’s vibes and hardcore gameplay.

A legendary SHMUP influential to the best makers in the genre, Hellsinker is now available on steam in its most advanced form! Gameplay, story, graphics, and even music all united into one cohesive and highly dimensional Shoot-em-up!

This is the story of a fighter who wanted to become...

Super Captain 3D is a shoot-em-up game where you become a Super Hero ready to fight the Pixel Invaders. It features an art style that combines 3D pre-renders with 2D pixel art. Use your Superpowers to protect the Universe!

A bite-sized, 8-bit style run-and-gun inspired by Saturday morning cartoons of the 80s!

The year is 1989. 12 years have passed since the Gogoh Army’s invasion of Earth. Exposure to alien technology during the war enabled Earth’s own technologies to take massive leaps forward. International conflict that was previously rife in the history of mankind fell to an all-time low, and the Earth Federation was established as a...

Shoot! Dodge! and... Get Hit!? "Ikaruga" is a vertical shoot 'em up that features an unique polarity-switching gameplay. Switch the ship's polarity and "get hit and absorb" enemy bullets! Achieve High Score with the chain bonus!

Buckle up for shoot ‘em up chaos in this fast-paced and hyper-stylized roguelite. As the infamous bounty hunter Black Paradox, it’s up to you to travel through space and defeat the Hellraisers – the most dangerous criminal organization in the galaxy.

Jetboy is a retro supercharged jetpacking pixel shooter with a pumping metal soundtrack.

Gun Crazy is a fast paced and hectic arcade style action shoot em’ up sporting old school pixel art and a retro sound track.

The Black Duck Army is back—bigger, badder, and armed with alien tech! In Gunslugs 2, chaos reigns as you blast through tanks, choppers, giant robots, and hordes of relentless minions. This action-packed, over-the-top run-and-gun adventure is a wild tribute to classic 80s and 90s action movies.