Games like Boom

"Nienix is a Sci-Fi Shooter game with physics-based bullet hell combat and action RPG progression. Play single-player, co-op with up to 6 players, or PvP with up to 40 players. Experience an epic journey through procedurally generated galaxies in search of the mythical artifact Nienix, with character progression systems and unique items to suit various playstyles."

"XenoRaptor is a Science Fiction Shooter game where players control cyberdragons, annihilating enemies in high-speed, skill-based action. The game features 2-player local co-op and up to 8-player online multiplayer. Design your own weapons and engage in strategic combat against cunning AI enemies, with the ultimate challenge of taking down massive bosses."

In "God's Trigger," players control supernatural beings in a brutal top-down shooter game. The duo, Harry and Judy, must kill their way through hordes of enemies to prevent the Apocalypse. With fast-paced combat, gory execution moves, and a wide range of weapons, players must combine strategy and skill to defeat the forces of evil.

"Kromaia is a 360° shoot-'em-up game that combines classic arcade action with modern technology, allowing players to explore and battle in three-dimensional space. The game features adaptive AI, with enemies getting tougher as the player improves, and true 360° movement and shooting that tests high-speed flying and sharpshooting skills."

Shwip is straight up twin-stick action, with a whip. Get that daily fix of pixel induced-destruction with devastating weapons & abilities the military would be jealous of. Evade, outlast, and play with style in three invigorating game modes. Unlock achievements, compete against friends in local-multiplayer, and show the world who's number one on Shwip's online leader-boards. Ready thumbs, soldier!

"Cavalry Girls" is a top-down shooter game where players protect their city with a team of girls and their Mecha. The game features a variety of equipment modules for each weapon, enabling strategic deployment based on enemy characteristics. Players must manage resources and choose between risk and safety in rougelike combat, with the goal of surviving an increasingly hostile battlefield.

Assault Android Cactus is a vibrant, arcade-style shooter where players control android heroes fighting against waves of robotic enemies. With a variety of distinctive characters, each with unique weapons and abilities, the game offers a dynamic and engaging experience. The game features a campaign mode with high replay value, as well as local co-op for up to four players, making it a great choice for fans of frantic, action-packed gameplay.

"Xenoraid: The First Space War" is a challenging vertically scrolling shoot'em up game with advanced shooting mechanics and AI-driven enemies for dynamic combat. You control a squadron of four fighters, each with unique weapons, and must switch between them strategically to survive. The game features over 40 missions, including intense boss fights, with procedurally generated elements for replayability. Fight against alien threats in mankind's first space war.

Synthetik is a rogue-lite game set in a futuristic world where AI servants, the "Machine Legion," seek to destroy humanity. As the human consciousness of a forgotten Android prototype, players must battle through the levels of Kaida Corporation's Headquarters, defeating enemies and bosses to reach and defeat the "Heart of Armageddon." The game features a wide variety of weapons, items, perks, and upgrades, with the option to play alone or in 2-player online co-op, where every mistake could mean the end.

In Solstice Chronicles: MIA, players navigate a dead colony on Mars as a corporate marine with an insurgent drone as an ally. The game features challenging twin-stick combat against mutants and other enemies, and requires strategic decisions to manage threat levels, scavenge for supplies, and upgrade weapons. The goal is to survive and uncover the colony's dark secrets.