Master of Orion/Controls

This game is controllable completely with, and it is highly suggested that you use one if you intend to play. The controls of the game are infinitely more difficult to manage without a mouse, but it is doable.

The primary means of adjusting things in the game is through the use of slider bars. These bars always have to total 100% of spending. Any increase of one category must result in a reduction of spending in a different category. This applies both for planetary build queues and research spending.