WekaInvaders

Galactix is a space shmup homebrew developed for the Pokémon Mini.

Ghost Pilots is a vertical-scrolling shoot 'em up arcade game released in 1991 by SNK.

The game consists of 10 missions. Each mission takes place in a vast cavern, with interesting weather conditions. You must explore it and complete the mission objectives -- usually collecting sub parts, rescuing trapped miners, or destroying giant, epic bosses. You can also explore the levels, but keep an eye on your fuel gauge and beware the many hazards!

A shooting game developed and published by Toaplan, released in 1989. The Original Japanese version of what was released in the west as Fire Shark, 'Same! Same! Same!' is notable for being single-player only and having a dramatically heightened degree of difficulty compared to its western release, as well as lacking a number of glitches that came as a result of the conversion to a 2 player game.

A freeware early style shmup.

Psyvariar is a vertical scrolling shooter released in arcades in 2000 by Success. The game contains a variety of stages and it features a 'buzz' gameplay style, making it possible to earn levels by dodging enemy bullets.

Shienryu is a 1997 shoot-'em-up by Warashi for the Sega Titan Video arcade system later ported to the Sega Saturn.

A game for the Game Master handheld. A shoot-'em-up which pits players against five intergalactic fortresses.

Gunnail is a vertical space shoot'em up. It's a very standard shooter - very fast action, and many enemies to kill. Player controls a space ship, and flies straight forward. He must destroy enemies - the spacecraft has a gun that can be improved by power-ups and special weapons. Player can obtain helpers ("option" from Gradius). At the end of each level a boss awaits - every boss is heavily armed and difficult to destroy.