Atmaja, P.W., Siahaan, D.O. and Kuswardayan, I. 2016. Game Design Document Format For Video Games With Passive Dynamic Difficulty Adjustment. Register: Jurnal Ilmiah Teknologi Sistem Informasi. 2, 2 (Jul. 2016), 86–97. DOI:https://doi.org/10.26594/register.v2i2.551.