What is your highest chance of winning?

Wasn't Fairie Solitaire more than 100%?

1

I entered the Galactic Arms Race won...and lost. You cannot believe the disappointment. I managed to get one later, but it was still a sorrowful time.

I seem to remember I was in one of those giveaways with 3 entrants for 2 copies. I didn't win, but it would have given me a 66% chance to do so.

And if I'd had any interest in entering Galactic Arms Race, my best would have been that 84% chance.

83.33% Without counting Galactic AR.