Play Silpheed online
Silpheed is an abandoned DOS science fiction shooter game, developed by Game Arts, designed by Osamu Harada - Takeshi Miyaji - Hiromi Ohba and published by Sierra On-Line in 1988.
It's available for download.
How to play Silpheed
CTRL+F11: slow down emulation, CTRL+F12: speed up.
At the copy protection screen just press enter.
Silpheed runs using Emularity.