Emphysematous gastritis is a rare and lethal gastrointestinal emergency if not promptly identified and managed. In rare cases, emphysematous gastritis is associated with Sarcina ventriculi infection, usually in patients with delayed gastric emptying. Here we report a lethal case of S. ventriculi-associated emphysematous gastritis in the absence of delayed gastric emptying in which the diagnosis was confirmed postmortem. This case provides an opportunity to review the clinical presentation, pathophysiology, and management of emphysematous gastritis so that the condition can be promptly diagnosed and managed to prevent significant morbidity and mortality.