gamester

Derived from game +‎ -ster.

gamester (plural gamesters)

1. A person who plays games.
2. (video games, nonstandard) One who plays video games.
   • 1990, Popular Mechanics, volume 167, number 3, page 37:

     Gamesters should know that Nintendo is considering a phone link that would allow players to compete via modem in nationwide competitions.

3. (gambling) A gambler.
   • 1726 October 28, [Jonathan Swift], “The Author’s Oeconomy and Happy Life among the Houyhnhnms. […]”, in Travels into Several Remote Nations of the World. […] [Gulliver’s Travels], volume II, London: […] Benj[amin] Motte, […], →OCLC, part IV (A Voyage to the Houyhnhnms), page 301:

     […] here were no Gibers, Cenſurers, Backbiters, Pick-pockets, Highwaymen, Houſebreakers, Attorneys, Bawds, Buffoons, Gameſters, Politicians, Wits, ſplenetick tedious Talkers, Controvertiſts, Raviſhers, Murderers, Robbers, Virtuoſo's; […]

4. (obsolete) A prostitute; one who is on the game.
   • c. 1604–1605, William Shakespeare, All's Well That Ends Well, act 5, scene 3, lines 187–188:

     She's impudent, my lord, / And was a common gamester to the camp.

Gamer is the term preferred by players of video games and tabletop role-playing games.

• (one who plays video games): gamer
• (prostitute): See Thesaurus:prostitute

• gamestress

• gas meter, meagrest