Organisations are involved in various types of negotiation. As digitalisation advances, such business negotiations are to a large extent electronic negotiations. Consequently, dedicated training for such electronic negotiations is important for mastering negotiation skills. The present book develops a new approach for a motivating and improved e-negotiation training by applying gamification, i.e. using game design elements in a non-game context, in order to improve participants' motivation, engagement, and learning outcomes. A negotiation support system used within an e-negotiation training is enhanced with game design elements. The book describes the design process, its theoretical foundations, and the evaluation of the gamified negotiation support system. The final quantitative evaluation shows higher motivation, engagement and better learning outcomes for participants in the gamified training compared to a conventional training. Organisations can employ the designed artefact for fundamental and effective e-negotiation training. Additionally, the book provides insights in how to design a gamified system for a particular application context.