NSW Premier, Gladys Berejiklian, has been accused of blackmail after tying a $25 million deal for a sporting complex to the election of a coalition candidate.

The premier says the multi-million-dollar, conditional pledge for the proposed Orange Sporting Precinct gives voters a choice between new Nationals candidate Kate Hazelton and sitting MP Philip Donato.

The Shooters MP said the premier's offer was "essentially" an attempt to "blackmail the community" over a sporting complex that could host NRL and A-League games inside an 8500-capacity ground.