I'm also looking at East India Company, which is a not-great trading and economic sim type game. I own it on a retail disc (bought it at a dollar store, somehow). I also seem to own East India Company
Gold on Steam, but I can't figure out if there's any difference between East India Company and East India Company Gold. Gold doesn't have a store page and it uses entirely different depots and packages, but it's not on the "Removed from Steam" games list. East India Company additionally has a bunch of expansions/DLC not included in the base purchase, and I have no idea if Gold includes them or not.
http://store.steampowered.com/app/25930/ <-- store page for regular
http://steamdb.info/app/25930/subs/ <-- regular
http://steamdb.info/app/254000/subs/ <-- gold