Raptor:Call of the Shadows is a top-down flying shoot-em-up game. It is notable for its weapons purchasing system instead of obtaining upgrades in the level like in similar games. You have only one life, and if you die you have to start over from a previously saved game (assuming you were smart enough to save it).
There isn’t very much of a story to this game. Basically you’re just a mercenary attacking a corporation for money. You gain money by blowing up buildings and enemy units or by selling extra weapons you don’t need. You can find a couple of weapons in the levels, but the good ones are in the mercenary shop. I don’t really have anything else to add that isn’t already in the Wiki article, but it’s a fun game.
Edit: 4/28/2024
I had a link to the 2010 Windows version on Good Old Games, but they lost the license to sell it in 2020. Steam has the DOS version as well as the 2010 version, though theirs has been labeled as 2015. As far as I know the only differences between 2010 and 2015 are the name and the fact that the 2015 version has Steam achievements.
The 2010 and 2015 versions have lower quality music and the mouse handles oddly within the menus. The graphics are slightly improved and appear a bit sharper in the newer versions.