Many games are released annually, estimating the game industry to be worth 138 billion USD by end of 2018 (Wijman, 2018).

However, only few titles establish continuous excitement and engagement amongst their gamers with revenue of 6 billion USD as the example of grand theft auto V shows (Batchelor, 2018).

As one in three people play games (SuperData, 2018), we need to understand factors for continuous engagement.

Understanding these mechanisms helps building games for continuous engagement and long-lasting impact.