Launceston boss Neil Bayliss says his side "deserved" to score two tries in the final minute and come back from 18-6 down to beat Old Elthamians 20-18.
Ed Holmes and Jake Murphy went over in the dying moments and full-back Kieron Lewitt kicked both conversions.
After seven losses by four points or less it was Launceston's first close National Two South win of the season.
"We've had a few go the other way so it's nice for one to go our way for a change," Bayliss told BBC Cornwall.
"I thought we thoroughly deserved the victory."
The win was the second in a row for Launceston - their first back-to-back wins since the end of September - as they moved up to 10th place in National Two South.
"We've turned a corner and I'm just immensely proud of what we're doing and what we're achieving now," added Bayliss.
"There's a great belief in the squad and to come here and snatch a victory is ideal."