Promotion hopefuls Cheltenham ended the regular season with a win at Plymouth.
Former Argyle striker Steve MacLean fired home a deflected free-kick to give the Robins the lead.
Preston loanee Juvhel Tsoumou came off the bench and headed in an equaliser for the hosts after the break.
But the Robins immediately attacked and after Jermaine McGlashan's shot was saved by keeper Jake Cole, MacLean collected the ball and found Marlon Pack, who nodded in.
Mark Yates' Cheltenham side will now face Torquay in the play-off semi-finals.
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Plymouth Argyle manager Carl Fletcher told BBC Radio Devon:
"We've been lucky in the last couple of games. As the season was going on we probably thought it's going down to the last couple of games, thankfully for us it didn't.
"Today we didn't play great, but we still had plenty of opportunities where we could score four or five goals. In terms of an end of season game, it wasn't a bad spectacle.
"Generally I'm a hard person to please, I always want more, I'll always want better and I'll always want to improve things.
"If this football club is ever going to achieve anything, we're not going to suddenly be able to spend loads of money and buy your way to success. It's going to be everyone pushing in the right direction to achieve things."
Cheltenham Town manager Mark Yates told BBC Gloucestershire:
"Some really good performances from players who haven't played as much as they would have liked. They showed me and a lot of people we've got a quality squad of players.
"I thought we're thoroughly deserved to win and it just puts us in a good frame of mind for the next couple of games.
"Our spirits are really good and confidence is high. I always said whoever gets there, form doesn't come into it and I think it's just two games of football where if you lose in the first game you haven't got to chase it or do anything stupid.
"We've just got to go into it; the lads are looking confident, strong and fit. We'll have a good week now."
James Spencer has an effort at goal from outside the box which goes wide right of the goal.
90:00 +2:46 Full time
Full Time The referee blows for the end of the match.
Effort from outside the penalty box by James Spencer goes wide right of the goal.
Effort from outside the area by Conor Hourihane goes wide right of the goal.
Foul by Harry Hooman on Ladjie Soukouna, free kick awarded. Free kick taken by Conor Hourihane.
James Spencer produces a right-footed shot from inside the area that clears the crossbar.
Effort from outside the penalty area by Conor Hourihane goes wide left of the target.
Free kick taken by Romain Larrieu.
Substitution Romain Larrieu replaces Jake Cole.
Free kick awarded for a foul by Jermaine McGlashan on Curtis Nelson.
Short corner taken by Marlon Pack from the left by-line.
Jeff Goulding takes a shot. Blocked by Maxime Blanchard.
Luke Young challenges Jermaine McGlashan unfairly and gives away a free kick. Free kick taken by Marlon Pack.
Short corner worked by Luke Young.
Corner taken by Luke Young from the right by-line, Harry Hooman makes a clearance.
Free kick awarded for a foul by Jermaine McGlashan on Onismor Bhasera. Free kick crossed by Luke Young.
Substitution Luke Summerfield joins the action as a substitute, replacing Theo Lewis.
Durrell Berry produces a right-footed shot from outside the penalty box and misses wide left of the target.
Durrell Berry takes a shot. Keith Lowe gets a block in.
Substitution James Spencer on for Steven MacLean.
Sido Jombati concedes a free kick for a foul on Luke Young. Shot comes in from Luke Young from the free kick, save made by Scott P Brown. Corner taken right-footed by Luke Young, Header from deep inside the area by Juvhel Tsoumou goes harmlessly over the crossbar.
Steven MacLean gives away a free kick for an unfair challenge on Maxime Blanchard. Conor Hourihane takes the direct free kick.
Effort on goal by Juvhel Tsoumou from just inside the penalty box goes harmlessly over the target.
Corner taken right-footed by Marlon Pack to the near post, clearance made by Maxime Blanchard.
Booking Onismor Bhasera is cautioned.
Shot by Ladjie Soukouna from outside the box goes over the net.
Juvhel Tsoumou shoots direct from the free kick.
Substitution Bagasan Graham on for Luke Garbutt.
Free kick awarded for an unfair challenge on Juvhel Tsoumou by Marlon Pack.
Assist on the goal came from Steven MacLean.
54:36 Goal scored
Goal - Marlon Pack - Plymouth 1 - 2 Cheltenham Marlon Pack finds the back of the net with a headed goal from close in. Plymouth 1-2 Cheltenham.
Steven MacLean sends in a cross,
Assist by Onismor Bhasera.
53:25 Goal scored
Goal - Juvhel Tsoumou - Plymouth 1 - 1 Cheltenham Juvhel Tsoumou grabs a goal from inside the area to the bottom left corner of the goal. Plymouth 1-1 Cheltenham.
Onismor Bhasera produces a cross,
Jermaine McGlashan takes a shot. Maxime Blanchard gets a block in. Outswinging corner taken left-footed by Luke Garbutt, Keith Lowe has a header from close range and clears the crossbar.
The ball is swung over by Durrell Berry, Warren Feeney has a header from inside the six-yard box and clears the crossbar.
Ladjie Soukouna gives away a free kick for an unfair challenge on Marlon Pack. Direct free kick taken by Marlon Pack.
Juvhel Tsoumou produces a left-footed shot from just outside the box that goes wide right of the goal.
The second half has started.
Substitution Alex MacDonald goes off and Juvhel Tsoumou comes on.
Substitution Robbie Williams leaves the field to be replaced by Joe Lennox.
45:00 +1:05 Half time
Half Time It is the end of the first-half.
The offside flag is raised against Warren Feeney. Scott P Brown restarts play with the free kick.
Unfair challenge on Conor Hourihane by Steven MacLean results in a free kick. Direct free kick taken by Durrell Berry.
Marlon Pack takes a shot. Save by Jake Cole.
Ladjie Soukouna fouled by Harry Hooman, the ref awards a free kick. Robbie Williams crosses the ball in from the free kick, clearance made by Harry Hooman.
Harry Hooman gives away a free kick for an unfair challenge on Warren Feeney. Strike comes in from Alex MacDonald from the free kick.
Free kick awarded for a foul by Durrell Berry on Marlon Pack. Direct free kick taken by Marlon Pack.
Durrell Berry produces a right-footed shot from a long way out which goes wide right of the goal.
The referee blows for offside. Scott P Brown restarts play with the free kick.
Free kick awarded for a foul by Warren Feeney on Harry Hooman. Direct free kick taken by Scott P Brown.
Marlon Pack provided the assist for the goal.
22:26 Goal scored
Goal - Steven MacLean - Plymouth 0 - 1 Cheltenham Steven MacLean fires in a goal from just outside the penalty area to the bottom right corner of the goal. Plymouth 0-1 Cheltenham.
Free kick awarded for an unfair challenge on Luke Garbutt by Ladjie Soukouna. Marlon Pack takes the free kick.
Theo Lewis challenges Ladjie Soukouna unfairly and gives away a free kick. Free kick taken by Ladjie Soukouna.
Foul by Jermaine McGlashan on Onismor Bhasera, free kick awarded. Robbie Williams restarts play with the free kick.
Conor Hourihane produces a right-footed shot from just outside the box that goes wide right of the goal.
Foul by Robbie Williams on Jermaine McGlashan, free kick awarded. Free kick crossed left-footed by Luke Garbutt, clearance made by Robbie Williams.
Warren Feeney takes a shot. Comfortable save by Scott P Brown.
Luke Young produces a right-footed shot from long range which goes wide right of the goal.
Onismor Bhasera fouled by Sido Jombati, the ref awards a free kick. Robbie Williams restarts play with the free kick.
Keith Lowe challenges Warren Feeney unfairly and gives away a free kick. Robbie Williams takes the direct free kick.
Jeff Goulding challenges Jake Cole unfairly and gives away a free kick. Direct free kick taken by Jake Cole.
Unfair challenge on Jermaine McGlashan by Robbie Williams results in a free kick. Direct free kick taken by Marlon Pack.
Steven MacLean has an effort at goal from outside the area which goes wide right of the goal.
The referee gets the game underway.
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