"Raiders of the Lost Ark" at 0.3%
And do you know what's the craziest part? I actually honestly DID get it by accident. I didn't cheese any settings, I didn't get friends in multiplayer to help, and I wasn't even trying to get it. I just happened to be America, steal an Egyptian relic, and have a German archaeologist nearby. I should buy more lotto tickets!
"Rest in Gold Pieces" 20%
The only expansions I don't own for CiV are the map expansions and the Wonders of the Ancient world so I literally can't get that one.