Worldwide, roughly 265 million people play football. It is a game that crosses borders and produces world-renowned superstars. As such, football qualifies as a perfect platform to start a social movement. Unmasking the BIG secret is a collaborative partnership of seven European organisations (complemented by multiple European strategic stakeholders in the field of football and public broadcasting), which aim to generate an environment in professional football in which it is safe to express Lesbian, Gay, Bisexual and/or Transgender (hereafter: LGBT) preferences. This project wants to apply the power of football to pursue the goal of generating a climate that is safe, secure, and inclusive for LGBTs.Unmasking the BIG secret proposes an innovative approach to this issue, leveraging on the stature and reach of professional football players. A team of high-profile football players will be formed that speak out in favour of LGBT acceptance in football, dubbed ‘Heroes of Football.’ The project will enroll an (online) educational game that will unmask the reasons underlying current LGBT issues in football. The game will be released on a high-profile launch day at a major football stadium in Europe. On this day, the Heroes of Football team will play a friendly match and the educational game will be publicly demonstrated, and subsequently made available through all available channels. As a follow-up, a toolkit will be developed that allows for the re-creation of the launch day at other football clubs, both at the professional and at the amateur level, to foster the uptake of the educational game and leave a lasting impression on local footballing communities. Finally, a documentary will be filmed and broadcast throughout Europe via television and showed online. The documentary will depict the international world of football and its current talking about fears for LGBTs to a broad, international audience engaging its viewers on a personal level.