Is there a way to change from Good to Evil all within 10 turns?

Game turns isn't as large a factor as the number of spare colony ships you have or to what lengths you're ready to save and load. Just find a lousy planet, colonize for alignment, destroy colony, repeat.

And if you have a transport you can get your people back off of it to before destroying it...

TFM

~SDC~

I became evil in about 3-4 turns. I had two colonies established, both had morality events, I choose evil in both cases (hey, the "good" options cost more than were in my treasury... okay, I *could* have chose "neutral", but it didn't pay enough ), and *poof*, I was evil...

... then I decided to choose evil for all future morality... just for the heck of it!

~SDC~