Fig. 5: Player engagement.

This figure provides context on player engagement. a, We show the number of solutions received from player per month after the release of the game, showing continuous engagement after the end of the initial rush. b, We compare the number of participants in BLS to some notable recent CSGs, over the first 3 years of existence, showing the impact of the integration into a mass-market game (Sea Hero Quest and BLS) compared to more traditional CSGs. See Supplementary Information, section 11, for sources for the numbers presented in b.