OSP Raid (16mb, ver1.31 updated 29/03/2014, no install .zip) is a very nice older styled graphic Japanese SHMUP freeware game. From what it looks like the game developer has used actual satellite images for the ground which adds a nice visual effect. Gameplay is good and starts off very easy and slowly progress to a more frantic pace but still not on the impossible side with it's free flowing shooting action with predictable enemy patterns unlike the hell shooter types. Quite a good scrolling shooter with standard fair Bosses. I was playing this for some time even if it became much of the same thing after a while.
ControlsArrow keys - Movement
Z key - Shoot
X key - Bomb
Esc key - Pause game
You can edit the game settings by opening the OSP RAID setting file.
Homepage Japanese website
http://www.kit.hi-ho.ne.jp/zapzap
Games Page written in English
http://www.kit.hi-ho.ne.jp/zapzap/works_eng.htm
Heaps of other freeware games to check out on that page as well like Project SEED, Sonic Sisters, WINGED GEAR and WINGLANCER for Win.
Also free game titles for MSX and the MSX Emulator, WINGLANCER for MSX, Rapid Fire, Dancing Star and HIT AND AWAY DX.