The man, identified by his family name Hsieh, was found slumped motionless in his chair in the cafe in Kaohsiung city.
Other patrons initially thought he was sleeping, but when an employee realised he was not breathing he was rushed to hospital, where he was pronounced dead, the Taipei Times reported.
Doctors confirmed he had suffered cardiac failure, ruling it a "sudden death" from prolonged computer gaming, the report said.
"Hsieh was a regular customer here and always played for consecutive days. When tired, he would sleep face-down on the table or doze off slumped in his chair. That is why we were not aware of his condition in the beginning," the employee was quoted as saying.
It was not clear what Hsieh was playing at the time of his death, with the report describing it only as "combat computer games".
The case came after a 38-year-old man was found dead at an Internet cafe in New Taipei City on January 1 following five days straight of video game binging.
Police said in both cases other patrons appeared nonchalant about the deaths, continuing playing even when tables were cordoned off for investigators to gather evidence.
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