In the dying stages, they registered a nail-biting 9-8 victory against an equally determined Agmark Rabaul Gurias outfit.
With both teams locked up at 8 all, a successful field goal attempt by Vipers number 7 Karis Peter in the 77th minute, broke the deadlock, giving Vipers their second straight win of the season.
It was a traditional arch rival clash that the Gurias would dearly love to host at their home turf the Kalabond Oval in Kokopo, however the venue was shifted back to the Santos National Football Stadium, at the last minute for security reasons.