355 Copyright © 2022, IGI Global. Copying or distributing in print or electronic forms without written permission of IGI Global is prohibited. Chapter 17 DOI: 10.4018/978-1-7998-9223-6.ch017 ABSTRACT Hate speech is increasingly hindering the possibility of raising collective understanding as well as the values of democracy based on mutual respect, tolerance, and equality. For that reason, the main objective of this chapter is to determine how game-based learning favors the acquisition of transversal competences within the framework of 21st century skills for tackling and addressing hate speech. In doing so, a total of four serious games—Bury Me, My Love; Another Lost Phone: Laura’s Story; Never Alone; and Life is Strange: Episode 2 “Out of Time”—have been selected to analyze their potential as a learning tool for combating hate speech. To this end, the Octalysis framework serves as a methodology for identifying transversal competences in matters of justice, equity, and emotional intelligence. The main results show that serious games are helpful assets in promoting empathy and other social values and skills that are necessary to combat hate speech in young people. Game-Based Learning for the Acquisition of Transversal Skills: Preventing and Addressing Hate Speech Eva Ordóñez-Olmedo https://orcid.org/0000-0003-3608-8262 Universidad Internacional de La Rioja, Spain Sergio Albaladejo-Ortega Universidad Católica de Murcia, Spain Marta Pérez-Escolar https://orcid.org/0000-0003-2575-7993 Universidad Loyola Andalucía, Spain