2. A bonus for reac on discovery for the first me, which grants 1500 points. The aim of incorpora ng this bonus is to reward students that have stronger pre-knowledge. In game version 1.0, there are 35 reac ons, among which is the Haber-Bosch process. In the case of Haber-Bosch process the algorithm checks two condi ons: 1) if NH3(g) is the only product and all other chemicals are not the products, and 2) N2(g) and H2(g) are the only reactants, and all other chemicals are not the reactants. When these two condi ons are true, the player receives the bonus for discovery of Haber-Bosch process. A message with the key facts of the discovered reac on or industrial process related to the topic of the game will appear (Figure ). Figure . Key facts about Haber-Bosch process.