Epic Games

According to legal filing in Canada, this company has been accused of hiring psychologists in an attempt to make Fortnite 'as addictive as possible'.
Source: news article (2019)

Fortnite's explosive growth led to months of intense crunch (i.e. overtime) for Epic employees and contractors, some of whom say they felt extreme pressure to work grueling hours to maintain Fortnite's success and profitability, resulting in a toxic, stressful environment at the company. In a dozen interviews conducted by Polygon over a period of several months, current and former employees say they regularly worked in excess of 70-hour weeks, with some reporting 100-hour weeks.
Source: Polygon (2019)

This company is a member of the Fair Play Alliance, a global coalition of gaming professionals and companies committed to developing quality games. They provide a forum for gaming professionals and companies to work together to develop and share best practices in encouraging healthy communities and awesome player interactions in online gaming. They envision a world where games are free of harassment, discrimination, and abuse, and where players can express themselves through play.
Source: Fair Play Alliance (2020)