The Maule Region in Chile possesses a rich cultural heritage associated with petroglyphs created by ancient hunter-gatherer inhabitants. This rock art has suffered damage over time due to natural and anthropic causes. Fostering positive attitudes toward petroglyphs may influence behavioral intentions related to their preservation. This study evaluates an augmented reality card game developed to promote positive attitudes toward the rock art heritage of the Maule Region, examining its usability and the effects of incorporating augmented reality elements. The game achieved a System Usability Scale (SUS) score of 79.7 (SD = 14.2), corresponding to an A-grade on the Sauro-Lewis curved grading scale, indicating good usability.Participants in the game condition showed higher heritage attitudes than controls (M = 6.13, SD = 0.80, $t_{\left(24\right)}$ = −2.33, p = 0.028). Augmented reality enhanced attitudes at moderate levels of usability (B = −1.02, p = 0.043), but produced no detectable main effect in mean comparisons alone. The results indicate that the game constitutes a system with adequate usability, effective in fostering positive attitudes toward cultural heritage, and that augmented reality enhances attitudinal outcomes under conditions of moderate perceived usability.