There are 2 posts tagged with Raiden (Series) here.
Raiden II is a shoot 'em up originally released in 1994 to the arcades where you'll you must fight hundreds of enemy crafts and this time destroy them for good. Here we have its online version.
Sand Scorpion - Sasori is a vertical scrolling shoot 'em from 1992 that we have here in its browser version. It's a pretty standard game of the genre, mixing unique elements with a very Raiden-like gameplay.
Shooter Craft is a retro platform game that combines the well-known Minecraft style and an adventure story where you'll must beat the evil zombies and biting creepers in a colorful and pleasant pixel art world.