Hello.

Which of the available sleeves match Battlestar Galactica Board Game cards? Are they opaque on one side?

When buying the BSG Extension, does one need to buy the full game as well? (As the old cards can be differentiated from the new cards)

Thankyou

I believe the Battlestar Galactica sleeves are all euro; something like 175 standard euro cards and 185 mini euro cards.

The fantasy flight euro sleeves (both standard and mini) are not opaque; they are transparent on both sides; however, they don't need to be opaque. The card backs from the Battlestar Galactica expansion match the card backs from the base game.