Shoot 'Em Up
Shoot 'em up (also known as shmup or STG) is a subgenre of shooter video games. Read the full article at the Wikipedia.

TBFTSS - The Pandoran War
v1.0 (13 Aug 2016)2D mission-based space shooter, based on the Battle for the Solar System space opera novel trilogy.
Genre: Arcade, Shoot 'Em Up 
The Bug Butcher
(19 Jan 2016)A fast paced action shooter inspired by the arcade classic Super Pang! Use a wide selection of weapons and powerups to tear through...
Genre: Arcade, Shoot 'Em Up, Action 
Galak-Z: The Dimensional
by 17-BIT
Prepare for the bar to be raised on deep-space 2D dog-fighting! GALAK-Z is a modern, A.
Genre: Arcade, Shoot 'Em Up, Shooter, Action 
Steredenn
by Pixelnest
Steredenn is a frenetic and chaotic space shooter, carved in big beautiful pixels, with insane boss battles.
Genre: Shoot 'Em Up, Shooter, Action 
Psycho Starship Rampage
You play the psychotic A.I. of a warship lost in space which tries to come back to Earth.
Genre: Shoot 'Em Up, Shooter, Action 
Super Star Path
by DYA Games
Classic color match puzzle meets space shoot'em up action! Hop into your awesome spaceship, open a path through huge waves of aliens...
Genre: Arcade, Puzzle, Shoot 'Em Up, Action 
Satellite Rush
by Kimeric Labs
Satellite Rush is a sci-fi top-down shooter with pixel art graphics and roguelike elements.
Genre: Arcade, Beat 'Em Up, Shoot 'Em Up, Shooter, Action 
Return of Dr. Destructo
by maxed
Dr. Destructo is at it again like it's 1987! The madman with his own army and fleet threatens the Earth with unspecified evil plans!...
Genre: Arcade, Shoot 'Em Up, Shooter, Action 
Geometry Wars™ 3: Dimensions
by Lucid Games and Aspyre
Enjoy the next chapter in the award-winning Geometry Wars franchise and battle through waves of enemies in this frenetic arcade shooter.
Genre: Shoot 'Em Up, Action 
Protostriker M
by Archendrus
1.0
(22 Jun 2014)
Protostriker M is an old school SHMUP and a throwback to the days of 8-bit gaming.
Genre: Arcade, Shoot 'Em Up, Shooter, Action 
Los Cuervos
by nihilocrat
2-player head-to-head flight sim made for the Space Cowboy Jam.
Genre: Arcade, Flying / Aviation, Shoot 'Em Up, Shooter