Martin O'Neill has challenged his players to "go for it" in Cardiff as a route to the World Cup finals opened up for Ireland.
The Republic benefited from Scotland's failure to win in Slovenia last night as they now know exactly where they stand; beat Wales at a sold-out Cardiff City Stadium and the Republic will advance to the play-offs.
Ireland could still qualify automatically, should Georgia win away to Serbia, though O'Neill is not hopeful.
"It's a tough ask for Georgia to win there," he says, asking his players to draw on the experience of big wins to get the victory in Cardiff.
"It's that feeling. The big nights we had in the recent past are fresh in the memory of the players," said the Irish boss.
"Whatever game-plan we have, we have to utilise it as best we can. At the end of 90 minutes we have got to find ourselves in front and I think we can do that. We have 90 minutes to try to get a goal, and I think the approach will be similar to the one against Italy in Lille."