Games like SigNul

Horizon Shift '81 is an explosive wave based single screen shooter with a real retro feel to it. You can even play the game in Tate screen mode!

Shoot The Zombirds is a shooter game with an intriguing story, amazing mechanics, and fantastic visuals accompanied by stunning music. However, it can be disturbed by ads and is full of bugs. The game challenges players to survive as long as possible against hordes of zombirds. Despite its flaws, the game's humor and addictive gameplay make it worth checking out.

Missiles! is a single-player action game challenging you to dodge incoming threats with stellar gameplay and beautiful graphics. While the experience is often humorous and engaging, it’s marred by annoying ads and numerous bugs. Can you avoid them all and survive the chaos?

Dust Settle 3D - Galaxy Attack is a single-player shooter where you control battleships with one finger to fend off galaxy invaders. The game features stellar gameplay and perfect visuals but is marred by annoying ads and frequent bugs that impact the experience. Despite its flaws, it offers an engaging space combat challenge.

Sine Mora is a critically acclaimed horizontal shoot'em up, combining innovative gameplay and stunning graphics. Its unique time-based challenge system sets it apart, while it offers a fresh take on classic shooter mechanics. Now available on iOS, get ready for a breathtaking adventure and one of the best shooter experiences.

"UFO Defense HD" is a strategy/simulation game where players defend against alien invasions. With upgraded HD graphics, the game offers a modern take on the classic 1994 title. Players must research alien technology, build bases, and manage resources to save the earth.

Cosmochoria is a single-player shooter game with fantastic visuals and a great soundtrack. As a tiny cosmonaut, explore a distant galaxy, uncover mysteries, fight aliens, and plant seeds to regrow life. With each playthrough, discover new secrets surrounding the universe while choosing to roam freely or establish a home base. Humorous elements will make you laugh along the way.

"Let Them Come" is a pixel-style survival shooter where you play as mercenary Rock Guner, tasked with eliminating alien hordes on a spaceship. Upgrade and customize your arsenal, utilizing FRENZY mode for maximum damage, as you face an onslaught of diverse enemies and boss creatures. Competitive players can climb online leaderboards and unlock new mixtapes as rewards for their shooter prowess.

"Distant Space" is a 2D pixel art real-time strategy game set in the vastness of space. As the captain of a space fleet, players must manage resources, build and upgrade ships, and engage in tactical battles against alien threats. The game offers a procedurally generated galaxy, providing unique challenges and opportunities in each playthrough. Exploration, diplomacy, and combat are key elements of this engaging space exploration experience.

"Lightning Fighter 2: Retro STG is a thrilling Shoot 'em Up game with spectacular mechanics, stunning visuals, and a fantastic soundtrack. Take control of the Falcon aircraft and shoot down Galaga-inspired alien invaders in this retro-style space shooter. Be prepared for a few bugs, but overall it's a fun and engaging experience for any shooter game enthusiast."