The Author(s) 2020. This quasi-experimental study explores the effects of a narrative coaching board game intervention aimed at enhancing participants' sense of self-mastery as part of facilitating narrative identity reconstruction. Three mixed analyses of variance compared differences between clinical (n = 31) and non-clinical (n = 31) groups over time on a measure of mastery. There were no significant group-by-time interaction effects, but both groups demonstrated a statistically significant improvement in mastery over time. From a complex adaptive system perspective, changes may indicate adaptive growth in recovery. A serious board game may be a useful way of facilitating narrative identity reconstruction in recovery.