The teammates worked together and finally unblocked the puzzle, allowing the game to proceed.

unblocked 是动词 unblock 的过去式，unblock 由前缀 un-（表示"相反、去除"）和 block（"阻碍、堵塞"）组成，字面意思是"去除阻碍"。在这里指"解开谜题"或"清除障碍"。