A trio wearing masks and wielding pistols and a shotgun pushed their way into an underground Queens casino Tuesday morning and zip-tied all the customers before cleaning out the place of more than $20,000 in cash and goods, police and sources said.

The six victims at Le Chao at 131-59 Fowler Ave. told cops they were playing video games when the robbers barged in and ordered them to get on the floor around 12:45 a.m., cops said. The three robbers bound their victims’ hands with zip ties and stole all their property. The victims ranged in age from 23 to 34, cops said.

Police sources said the business was an illegal casino. An NYPD spokesman was unable to confirm what kind of business it was.

The men stole $7,000 from a locked desk drawer and about $13,000 in cellphones and other items from the victims. They also took off with the business’s surveillance system, police said.

“They took all their s–t,” a police source said.