No, I am not going to blatantly copy everything over from the official guide. Instead, this link will take you directly to the PDF version of the guide posted on the game developer's official site.

http://www.jm-j.com/starsky/star_sky_walkthrough.pdf

It is very easy to unlock most of these simply thru normal playthroughs. But given that this is more a "numbers combination" game, the different methods and paths you can attempt tend to get very confusing unless written down. I started doing this for my own guide when I realized there was already an official one available. Why recreate the wheel, right? Especially when this official version was very well put together.

Enjoy.