For players who aren't familiar with Raiden, it's your typical vertical scrolling overhead shooter, a-la River Raid and 1942. What gave the game charm was its booming soundtrack and huge explosions, much of which was surprisingly preserved in Atari's color portable version. Thanks to the Lynx's excellent stereo sound capabilities, you're treated to crisp tunes but without the bass. It's also one of the very few Lynx titles that forces you to play the game while holding the system clockwise. This may seem awkward at first, but after a while you realize the benefits this offers in giving you much more viewing area ahead of you thanks to the vertical screen configuration.
As a shooter, Raiden is is pretty straightforward. Be prepared expect to fire like mad while avoiding enemies (and their fire) and periodically tossing a smart bomb when things get a bit too haywire. But like any good shooter, the whole is greater than the sum of its parts, and Raiden is no exception.
Purists might scoff because Lynx Raiden also scrolls a bit horizontally as well. In my opinion, this only enhances playability and allows sprites to be rather large for a relatively underpowered machine like the Lynx. Besides, it's not like you can infinitely scroll the screen horizontally. It's quite minimal, and enemies that are offscreen generally won't sneak up on you while you're moving sideways.
With nary a hint of slowdown, huge enemies and smooth scrolling, Raiden is a showcase title that shows off the Lynx's sprite capabilities. Recommended.