Games like Ikaruga

"Sky Mercenaries" is a 2D shoot 'em up released on Steam featuring 8 worlds, over 32 story missions, and endless random content. Choose your pilot, fighter, and loadout to battle over 50 enemy types and challenging boss fights. Upgrade your pilots, drones, and fighters, and unlock abilities in 3 skill trees for increased customization and firepower. Get ready for an epic sky battle!

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.

"Aqua Kitty: Milk Mine Defender" is a fast-paced, retro-style shoot-em-up game. Players protect a school of cat milkmen from robotic enemies while they extract milk from the ocean floor. With upgradeable weapons, power-ups, and multiple levels, it's a challenging and fun experience for fans of classic arcade games.

"Jamestown: Legend Of The Lost Colony" is a local co-op top-down shooter for 1-4 players, set on 17th-century British Colonial Mars. It offers a unique cooperative gameplay system, where players can resurrect their teammates, and features intense action, deep mechanics, handcrafted pixels, and a masterful soundtrack. Blast your way through historic Mars in this exhilarating and hilarious experience. A remastered version, Jamestown+, is also available with additional content and updated visuals.

"Crisis Wing" is a fast-paced, challenging shoot 'em up game with retro-style pixel graphics. Players control a spaceship and must navigate through various levels while battling enemy ships and bosses. The game features a variety of weapons and power-ups to help players along the way, and includes local co-op mode for up to 2 players.

In "Blazing Chrome," players battle through a dystopian world overrun by machines, choosing between a human resistance fighter or a reprogrammed robot. The game offers tight side-scrolling shooter action with a variety of weapons and abilities, as well as local co-op play. With hand-drawn graphics and challenging gameplay, Blazing Chrome is a love letter to classic run-and-gun games.

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.

In "Alltynex Second," players must reclaim Earth from AI dominance 40 years after ALLTYNEX, a Stellar-class Administrative Computer, tried to eradicate mankind. This 2.5D vertical scrolling shooting game features five stages, close-combat Blade melee attacks, and ranged options like Homing Lasers and the Buster Rifle. The fate of humanity rests on your shoulders as you battle drone armies and Guardian Soldiers to end the AI's reign.

"Jets'n'Guns 2" is a side-scrolling space shooter where you play as a brave pilot tasked with saving the universe from a powerful enemy threatening to wipe out all sentient life. Engage in epic battles, travel through space and parallel dimensions, and unleash an arsenal of deadly weapons in this action-packed adventure. Local co-op play is also available for even more explosive fun.

"Binarystar Infinity" is a 1-bit shoot 'em up game with challenging arcade-style gameplay and handcrafted levels. Players must defend against an unknown mothership that destroyed their moon, either in single-player mode or with a friend in co-op. The game features nostalgic 1-bit graphics and smooth feedback controls, with the option for a more intense experience with friendly fire in co-op mode.