There are 2 repositories under shoot-em-up topic.
A space shooter game made with Amethyst and Rust.
Remake of the space shooter game Retaliate for the Commodore 64
Classic bi-plane shoot-'em up
A classic inspired shoot em' up game written in Java with JavaFX and FXGL.
Old-school scrolling shoot 'em up game for Android
Powermanga is a shoot 'em up with 60 different enemies, 40 meteors, numerous weapons, many end of level baddies, spaceship power-ups and lots of other surprises.
An efficient bullet hell library made for Gamemaker Studio 2.3.0.
Port of Friking Shark (remake of Flying Shark) on the OpenPandora, Odroid and most Linux. Also with AmigaOS4 support. Status: Working (using gl4es).
This is a Sega Master System clone of an Atari 2600 game named Turmoil. I had originally made the first, unfinished, version for SMS Power's 2012 competition, then now, four years later, I decided to resume development on this for the 2016 competition.
Space Collider files
They don't make light guns that work with LCD screens, so I wrote this to emulate the old arcade light guns with a modern PC. -- Uses Arduino pro micro, a gyroscope, an accelerometer, some geometry and physics math.
A dragon themed shoot-em-up for the Sega Master System. Originally made for the SHMUP JAM 1
Defend the Earth files
The source code for HEXES, A puzzle shoot'em up!
:video_game: An old 2D "Shoot 'Em Up" Sci-fi
A top-down action game made with Bitty Engine.
Shoot 'em up game where the player reflects projectiles rather than fire their own. Assignment for the course Game Design 2: Game Development (5SD064) at Uppsala University.
A Shoot 'Em Up base game made in Python-pygame from scratch
Vertical scrolling shoot 'em up in the browser, using the zCanvas rendering lib. This is intended as a "bullet hell" game and is aimed more to showcase how to use zCanvas for game development.
A juicy shoot 'em up.
Rouge-like top down shoot 'em up made in Godot
Space War is a Shoot 'Em Up type of game for mobile devices, where the player controls a ship that can destroy enemies, and pick up items, to advance in the game and increase their score.
Alien Battles files
✈ ➥ Stellar Duelist is a Shoot-Em-Up game, written in C# using the MonoGame framework.