A Codman Square liquor store was robbed at gunpoint on Tuesday night by a masked gunman who stole about $200 from the cash register. According to a Boston Police report, the gunman entered the Budget Liquor Depot at 861 Washington St. about 9 p.m. and ordered the employees to get behind the counter while pointing a black handgun at them. The masked man asked the employees, "Do you want to be a hero?" The employees did not intervene and the robber fled the store on foot. No arrests have been made.