EGMs are one of the biggest drivers of gambling expenditure in many countries ( The Economist, 2017), and have one of the strongest associations with problem gambling amongst established gambling forms ( Delfabbro, King, Browne, & Dowling, 2020). The “structural characteristics” of electronic gambling machines (EGMs) are design features that can promote spending excessive time and money on these games, which can therefore contribute to gambling-related harm ( Browne et al., 2016 Wardle, Reith, Langham, & Rogers, 2019), and which might make EGMs especially appealing to people with gambling problems ( Cornish, 1978 Goodie, 2015 Griffiths, 1993 Landon et al., 2018 Livingstone, Woolley, Zazryn, Bakacs, & Shami, 2008 Parke, J.