Word chain, also known as grab on behind, last and first, alpha and omega, and the name game,[1][2][3] is a word game in which players come up with words that begin with the letter or letters that the previous word ended with. A category of words is usually chosen, there is a time limit such as five seconds,[1][4] and words may not be repeated in the same game.[5] The version of the game in which cities are used is called geography, and a generalized version with place names is called Atlas.