Mason Pendrous last used his swipe card to get into his university accommodation on August 12.

For the next fortnight, it appears that nobody had seen the 19-year-old leave his room but his online activity "increased substantially" until his last contact with a fellow gamer on August 24.

The University of Canterbury commerce student's body would be found nearly a month later.

It has raised questions about how a young student could go unnoticed and be holed up in his room without any red flags being raised.

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Experts have warned that excessive computer use or time spent online gaming can

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