Plymouth boss Peter Reid feared his side had thrown away the points until their last-gasp winner against Swindon.
Defender Reda Johnson and Bradley Wright-Phillips put the Pilgrims 2-0 up but Swindon replied through goals from David Prutton and a Michael Rose free-kick to pull things level.
However, Wright-Phillips struck deep into injury time to snatch a 3-2 victory.
Reid said: "We looked like we had thrown it away but we kept going and I think we deserved to win.
"This is not an easy place to come and get a result but we made things difficult for ourselves after a very good start.
"The crowd were absolutely fantastic. Brilliant. I can't say enough, what it means to the players. I'd like to pay tribute to the fans. They have been fantastic."