Age of Steam involves trying to move colored cubes to destinations of the same color. By moving a cube along your own track you increase your income level. You can also move goods along other players' track but that means they will gain the increase in income.
Age of Steam also includes a number of other interesting features, namely the action selection phase. Actions allow players to convert a town to a city, making a new destination for goods, to increase the distance their trains can travel, and to build additional track. However, each action can only be selected once, and some are more powerful than others. Another important feature of the game is the fact that money is in short supply and players have to issue shares to raise more. You have to be careful not to issue too many shares, as you have to pay a dividend on them each turn and they count as negative victory points at the end of the game. As the game progresses players should be aiming to move goods along longer routes and opening up new sources of goods.
At the end of the game players score victory points, which are calculated by subtracting the number of shares you issued from the amount of income you attained. Constructed track also contributes towards your victory point total.