The deal furthers the current agreement between the two parties until 6 August 2022, seeing IGT deliver 400 new GameTouch™ self-service vending machines to the lottery.
The supplier will also continue providing the New York Lottery with "an advanced central system, terminals and ongoing services."
Jay Gendron, IGT COO, Lottery, said: "IGT delivers excellence by focusing our innovations in content, hardware and platform technology that enable customers such as the New York Lottery to continue its ranking as one of the largest and most successful lotteries in the world.
"IGT is pleased to extend our long-term partnership with the Lottery and we will do our part to ensure it continues to set record-breaking sales and maximise its more than $68bn contribution to education in New York."
IGT is sponsoring the Land-Based Operator of the Year Award at this year's Global Gaming Awards Las Vegas.