Has a Belgian developer, Crazy Monkey Studios.

Has a Belgian developer, The Artistocrats.

Developer GRIN is Belgian

Has a province named Belgica.

The DLC Napoleonic Wars has a map called la haye sainte which is set in what is now Belgium.

You can't have pro cycling without Belgium.

You can play as Belgium.

Has some Belgian cities as city states (Brussels and Antwerp most notably) and there is also a mod that enables playing as Belgium as a civilization.

Has a Belgian developer, namely I-Illusions.

Has Belgian anthracite.