Games like Rail Gunner

"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.

"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.

Dust & Neon pits a single mech-enhanced cowboy against an army of robots in this fast-paced, Roguelite Action RPG twin-stick shooter, set in a futuristic Wild West.

"IS Defense" is a strategy tower defense game set in a modern-day war scenario. Players must defend their base from incoming enemy forces using a variety of weapons and towers. The game offers challenging gameplay with realistic ballistics and a wide range of enemy types to keep things interesting. With multiple difficulty settings and leaderboards, "IS Defense" offers plenty of replayability.

"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."

"Genome Guardian" is a free-to-play prologue of a complex shooter game set in a bioluminescent alien world. Players must research upgrades, navigate 8 game modes, and pair DNA nucleotides to create hybrid bioweapons. The game features 49 unique turrets, 96 perks, 72 turret & weapon mods, and 32 mutations to alter gameplay, providing a high level of customization and replayability.

Zombie Party is a quirky, top-down shooter game where up to 4 players cooperatively battle hordes of zombies in various scenarios. Customize your character and weapons, and defeat bosses to progress through the story. With its humor-filled style and challenging gameplay, Zombie Party offers a fun and engaging experience.

"Run Build Pew!" is a voxel-based game where you play as a knight battling enemies while building your own fortress. Collect resources, craft items, and strategically place defenses to protect your base in this unique blend of action and strategy gameplay. With procedurally generated levels, the challenge is different every time.

"Taur is a single-player action-strategy sci-fi game with wonderful mechanics and fabulous visuals. Command the Prime Cannon, unlock and upgrade weapons and abilities, and build defenses to withstand different types of attacks. Every object in the environment is destructible, providing a tactically engaging experience, but beware of the heavy grinding."

Corecraft - Pixel Invaders is a single-player retro spaceship shooter featuring excellent game mechanics and outstanding pixel art graphics. This free shmup offers intense action but involves lots of grinding to progress. While fun and engaging, players may find the frequent ads somewhat annoying.