Sentence:  The US <WSD>gaming</WSD> industry, in a pamphlet called Demystifying Slot Machines [...], argues that "slot manufacturers need to build devices for a society with a decreasing attention span and an increasing demand for exciting, fast-paced entertainment, all in a marketplace overflowing with competing entertainment options". 
Meaning of the word marked with <WSD> tags:  The playing of a game or games, including but not limited to video games and games of chance.