Top similar games like SEISO:

Exit the Gungeon is a small, spin-off 'dungeon climber' immediately following the adventures of the misfit Gungeoneers.

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!

The skies are aflame and the seas will overflow with wreckage in Vlambeer’s stylish arcade shooter LUFTRAUSERS! Take to the skies in customized fighter planes to battle battleships, submarines, and rival aces for glory, honor, and high scores.

Tiamat’s Drink is a shoot ’em up roguelike game inspired by the 16-bit era consoles. Fight against powerful enemies, defeat unique bosses, unlock challenging levels and obtain extra powers! So get ready and don't forget to enjoy our exclusive soundtrack!

1982: Tenacious of the Air is a vertical scrolling shoot ’em up set during the South Atlantic conflict. Pilot five historic Argentine aircraft, choose your ordnance, take off from aircraft carriers or from land, and relive missions inspired by true events.

Combining retro puzzles and a arcade space shooter. You and your crew found strange materials in the galaxy core to upgrade your ship to the most powerful. While collecting core materials you came across something unbelievable ... The Core Message. The Core Message changes everything.

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.

桜を見ながら西瓜を割り、紅葉を見ながら鍋をつつく こんな季節に誰がした！ イレギュラーでシーズナルなシューティング幻想！

Fast paced Top-down shooter! Smartly use IRCM to evade the constant barrage of bullets and missiles and destroy everything that stands in your way.

Prepare yourself for an insatiable rain of bullets, bombs, and beams in Crimzon Clover. From Japanese indie developer Yotsubane, this retro top-down shooter is a wild ride you won't want to miss out on.

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.

Geometry Wars: Retro Evolved is a old school style shooter, but remixed for the 21st century with next generation graphics and deep, modern gameplay. Playing is simple: you are a geometric "ship" trapped in a grid world, facing off against waves of deadly wanderers, snakes, and repulsars.

Who are you fighting for? My usual job turns into a big mission. An easy-to-understand system reminiscent of the old barrage STG. Pave the way with powerful PowerShots!

Deathsmiles is CAVE's bullet-hell shoot-'em-up where you take the role of one of five Angels to defend the magical land of Gilverado from an invasion by Hell itself! Eradicate this devilish assault!

This is a retro space shooting game, where you only fight against the strongest enemy. There are 15 unique bosses in the game, and players need to use different weapons and strategies to defeat them. Dedicated to you who are both challengers and retro game lovers.

Zunius - A Psychedelic Rogue-Like Bullet Hell. Beneath the stars, the moon and the infinite you will navigate this celestial journey as the mysterious traveller. Whom are you? Where are you? What is the nature of this universe? How can you possibly dodge all these bullets? Play this game to find out.

RADARjAM consists of the constant unpredictability of your enemy’s location. Dodge what you can't see in your radar equipped fighter!

Fantastic Danmaku Festival is a Touhou Project fanfiction STG with colourful danmaku, beautiful remix music and original music. Besides the characters we know in Touhou Project, there is also a brand new original character named Nix in this game! With the Scarlet Devil mansion as their stage, the girls are soaring in the sky of Gensokyo!

Escape the Maze of Malice in this frantic 2D top-down shooter!

Battle your way through waves of enemies in an explosive video-pinball arena. Choose your balls and embark through 4 randomized stages. Use each ball's unique tilt power to turn the odds to your favor.

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!

Absorb mass. Bend gravity. Detonate everything. A fast-paced hardcore bullet hell where every explosion is your choice.

Repel extraterrestrial entities!

Tumblestone is the first original action-puzzle game of the past fifteen years -- completely reinventing the genre into a deep and cerebral puzzle solving experience that you won't forget.

誰が強いのか、誰が賢いのか、誰が正しいのか　畜生の理に則って、全て弾幕で決めよう！ ワイルドでビーストライクなシューティング幻想！

Punch through the cosmos! An arcade-inspired shoot-em-up where you play as an immortal lobster speeding through space.

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.

Take to space in this action-packed shmup, where every wave of enemies is rewarded with a buff and debuff. Play through the intense story and arcade modes to become an ace pilot. What stats will you increase? Which ones are worth the sacrifice? The battle begins!

"Murasaki" is a puzzle explosion game. Use explosions to clear the screen of pesky obstacles filling it up. The only controls you need are the directional buttons and two other buttons (Z and X)!

弾幕は　地獄であるほど　美しい 深ければ深いほど地底は地獄の姿を取り戻す ヘリッシュでラブリーな弾幕シューティング地獄

La Furia de las Trenzas is a survivor-like roguelite where you'll face relentless hordes of British soldiers trying to capture Buenos Aires. Recruit your platoon of soldiers with special abilities and defend the town square! 

Survive against a swarm of geometric enemies and the bosses guarding your way forward in this fast, minimalist arcade survival game. Bounce, boost, and slide through the chaos, chain kills to build your multiplier, and chase the leaderboard. Simple to pick up, brutal to master.

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

Mow down endless hordes of enemies in the arena of this dark cyberpunk survival roguelite. Play as a fully modular robot, snapping together multiple weapons and components to craft your perfect build. Collect powerful items to forge game-breaking synergies and annihilate everything in the Pit.

Cluster Fly is an arcade action game with an abstract art style featuring high-score based gameplay with online leaderboard. The player controls a spaceship to collect radioactive cargo while dodging fireballs, lasers and bombs.