My favourite board game is called "1829" it's played on a map of England and Wales which is printed up with a hexagonal grid. The object of the game is to buy and build your railway, you do this by buying shares in a company and when you become the majority shareholder you can lay track and buy trains, the track sections are on hexagonal tiles which you place on the map. When you run a train you have to decide how to take the revenue it earns, you can either declare a dividend which means that you and every other player who has shares in the railway company gets paid, or you can take the revenue in company credit which you can use to buy more trains. If you declare a dividend the share price goes up, if you take company credit the share price goes down.
The winner is the person with the most money at the end of the game, which happens when the bank runs out of money. But it's not that simple to work out because your money total is calculated by how much cash you have plus the current value of all the shares you own. Company credits are worthless and don't count.
The rules are quite complicated and the game can last anything up to eight hours. I haven't played it for years because I can't find anyone mad enough to spend eight hours playing a board game!!