You've got to spend money to make money
In Corruption, you discreetly fork over bribes to the powers that be — specifically, the powers that award lucrative construction contracts.
If your bribes are sufficient, your firm will get good contracts and its bottom line will swell. If your competitors' lucre shines brighter, though, you've lost opportunities, profits, and the satisfaction that some bureaucrat's Caribbean tour on your dime was at least good for something.
Corruption is a card game of pure strategy. It combines poker's crafty deception with the crooked milieu of the Gilded Age.