Thieves escaped with around £1,000 in cash after entering a theme park and breaking into an amusement arcade.
Police believe intruders entered Camelot Theme Park, Charnock Richard, through a fence at the rear of the park overnight on July 11.
They then forced a fire exit door to one of the arcades.
It is believed a blunt edged instrument was used to prise off the front of several computer games and fruit machines inside the building.
The thieves escaped by the same route leaving empty cash float boxes from the machines on the floor.
Anyone with information about the break in is asked to call Chorley police on 01257 246225.
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