Moss has quietly published one of their classic shmups, Raiden III, to the Steam marketplace.

Raiden III is another entry in the shmup series that introduces a few new things while also not trying to break the mold. A new “3D scrolling system” was implemented in the title, where the camera can point downwards towards the player to highlight the environment moving passed you. The blue laser also got an overhaul, making it look and feel more like a laserbeam.

Here are the key features for Raiden III:

• Gameplay – Two player co-op mode is enhanced by an exclusive new attack skill: a beam that is usable whenever one player lines up in front of the other. In Double play mode, both players share the lives and bomb stocks, and without continues.
• Various Modes – Score Attack, Boss Rush, Replay & Gallery, Option and 3 play modes (solo, dual and double).
• 7 Unique Levels – The first three levels on Earth and the last four in space. Level design is based on previous Raiden games: the first three levels are particularly close to previous games, with the first based on the original Raiden; the bosses are also similar to those in the corresponding levels of Raiden II and Raiden DX.
• Adjustable Display Modes – Window mode, full screen mode, adjustable zoom ratios (x0.5, x1.0, x1.5, x2.0).
• Bonus Contents – 2 CD’s worth of OST included with a total of 36 music!

Raiden III is currently $8.99 dollars on Steam, a 10% percent discount that ends on September 30th.