User experience (UX) and neuroscience are becoming trendy in the industry, but how can these disciplines concretely help a team to develop a game? Some designers might think that this knowledge is not easy to apply, or even fear that it will distort the experience they intend to offer. However, UX and neuroscience (mostly cognitive psychology) combined are at the service of design, and can provide very concrete and easy-to-use tips to anticipate and solve design problems, sometimes even before the play testing phase. By having a general understanding of how the brain works and by following UX guidelines, the designers increase the chance of their audience experiencing the intended design. This talk will offer an introduction to user experience and cognitive psychology applied to video game development, illustrated by examples from various titles, including Fortnite.