Games like Polybius Invaders

"Ultratron is a sci-fi shooter game with classic arcade gameplay, updated for the modern era. Fight through 40+ levels as the last humanoid battle droid, with upgrades, pet drones, and special abilities. Play in single-player mode or drop-in two-player co-op, with support for English and five other languages."

"Starr Mazer: DSP is a single-player Science Fiction Action game with outstanding gameplay, awesome graphics, and a wonderful soundtrack. In this side-scrolling shoot'em up, you control a squadron of pilots with diverse skills and weapons, battling through nine intense levels to take down the G'ell Super Ship. The roguelike twist on the lives/continues system, combined with the ever-evolving SK:ORE system, ensures that the fight never ends."

"R-Type Final 2" is the latest installment in the classic shoot-'em-up series, now available on PC. The game offers updated visuals and gameplay features, while retaining the intense action and variety of weaponry that defined the originals. Confront an ever-evolving enemy in the form of the Bydo, with stages that transform and corrupted by their presence. A must-play for fans of the genre, new and old.

Crimzon Clover: World Ignition is a top-down shooter from YOTSUBANE, AdventurePlanningService, featuring intense bullet hell action and customizable ships. Choose from four different modes, including Original, Unlimited, Time Attack, and Boost, and set your difficulty to either Arcade or Novice. The game features a unique multi-gauge system that allows you to upgrade your ship and control your playstyle.

"Dread Templar" is a solo-developed action game that pays homage to 90s classics, featuring a fast-paced campaign with over 100 weapon upgrades and 25+ levels. Battles against diverse enemies and thrilling boss fights take place in distinct environments with retro pixel-art graphics. Experiment with different playstyles and search for hidden secrets.

"Utopia Must Fall" is a vector-style base defense arcade shooter with rapid progression and procedural attack waves. Players must defend the city's turret and choose upgrades wisely from a sizable tree, with options ranging from beefing up weapons to strengthening shields and deploying automated turrets. The game is easy to learn, with automatic firing, and offers fast-paced progression to suit various playstyles.

"Sky Force Anniversary" is a vertical scrolling shoot'em up game with modernized graphics and intense battles. The game features various aircrafts to upgrade, numerous enemies and bosses to defeat, and challenging missions with increasing difficulty levels. With its vibrant visuals and captivating gameplay, Sky Force Anniversary offers a thrilling shoot'em up experience.

"Stellatum is a shooter game featuring local multi-player for up to 4 players, with options for co-op, PvP, and split screen. As an extraterrestrial race, you'll navigate through space, starting with destroying a threatening comet and uncovering a deeper conflict. The game boasts good graphics, detailed ship customization, and various shooting methods, making for an immersive and action-packed experience."

This is a side-scrolling shooting game in which the player takes control of the "Drainus", a ship that can absorb energy bullets, to take down the countless enemy ships zipping through space. Energy absorbed can be used to enhance the ship's functions, such as adding new weapons. StoryThe Planet Halpax is located in the far reaches of space, suffering from the oppressive rule of the Khar…

Axiom Verge is a metroidvania-style game with retro side-scrolling action. As a scientist who awakens in a mysterious, alien world, you'll use powerful weapons and abilities to explore, solve puzzles, and battle bosses. With a focus on progressive discovery, uncover the secrets of this mysterious world and learn its connection to your own fate.