Games like Silpheed

"Bladestar" is a sci-fi cinematic action shooter where players defend the galaxy in their Manta Starfighter, battling pirates, rebels, and aliens across six procedurally generated worlds with over 50 waves of enemies and eight bosses. The game now features Steam Leaderboard support, allowing players to compare their high scores with others. Players can also collect experience to unlock ship customizations and upgrade their pilots.

In Space Dragons, a frenetic shoot 'em up game, you must pilot your spaceship to save Earth from alien invaders. Choose your ship, each with unique abilities, and battle through 10 stages of intense action, upgrading your weapons and ship along the way. Local multiplayer is available for even more explosive fun. Confront powerful bosses and a meaty, bloody challenge in Space Dragons.

Welcome to All the Stars, a retro-inspired space shooter where thrilling combat meets a cosmic narrative. Face waves of enemies, alien horrors, and a galaxy-changing choice. It’s an amateur passion project but it just might surprise you, no load screens, no microtransactions, just pure arcade action.

"Xenoraid" is a Science Fiction shooter game that offers various gameplay modes, including single-player, co-op, and multi-player. The game features exciting vertical scrolling shoot'em up gameplay with modern mechanics, such as the ability to switch between four fighters during combat to optimize weapons. Upgrade, repair, and enhance your squadron between missions, and test your skills in three endless survival missions with online leaderboards.

In Shoot 1UP, players control a fleet of ships instead of a single one, with each 1UP collected adding to the armada immediately. The game features up to 30 ships on-screen at once, and weapons upgrade as more ships are collected. Local co-op play allows for up to 60 simultaneous player ships, and sacrificial bombs become more powerful with more ships. The game offers a challenging yet enjoyable manic shooting experience.

"Asteroid Bounty Hunter" is a space shooter centered around the veteran hero John and his AI spaceship. The game features unique boss fights, defense of nearby planets from asteroids, and battles against other bounty hunters. The concept revolves around farming experience for upgrades and collecting mastery points from rival ships. — NO RELEASE DATE OR DEVELOPER/PUBLISHER MENTIONED.

REVOLVER360 RE:ACTOR is a rail-shooter game with a 360-degree perspective, where players battle against hordes of enemies in frenetic action. The game features a unique reactor mechanic that allows players to slow down time and aim for critical hits. With upgradable weapons, various levels, and a pulse-pounding soundtrack, REVOLVER360 RE:ACTOR offers an intense and immersive shooter experience.

Survive the Rift is a roguelike shoot 'em up with procedurally generated levels, unlockable ships, and plenty of items to make each run unique. Inspired by classic 16-bit era scrolling shooters with modern roguelike game mechanics.

RANDOMAX is a single-player sci-fi rogue-lite vertical shooter where you harness a chaotic arsenal of misdelivered heavy weapons. Set in 2050, battle the Randomax Pirates who have overrun the Sepulch Space Archipelago, aided by bold heroines and mysterious allies. Adapt your strategy to turn the tides in this intense test of resourcefulness and luck.

In Atomanta, you step into the role of Taria Takara, a space pirate on a mission to recover a highly valuable artifact hidden on the planet Azavuraz. Armed with the powerful Atomic Manta warship, Taria finally has a chance to claim the bounty and pay off the debts from her previous handlers.