Set
https://en.wikipedia.org/wiki/Set_(card_game) ?
Mastermind
https://en.wikipedia.org/wiki/Mastermind_(board_game) ?
http://www.webgamesonline.com/mastermind/ ?
Chomp
https://en.wikipedia.org/wiki/Chomp ?
http://www.whydomath.org/Reading_Room_Material/ian_stewart/chocolate/chocolate.html ?
Ricochet Robots
https://en.wikipedia.org/wiki/Ricochet_Robot ?
https://boardgamegeek.com/boardgame/51/ricochet-robots ?
http://www.robotreboot.com/classic ?
Eleusis Express
https://en.wikipedia.org/wiki/Eleusis_(card_game) ?
http://www.logicmazes.com/games/eleusis/ ?
http://www.logicmazes.com/games/eleusis/express.html ?
Sokoban
https://en.wikipedia.org/wiki/Sokoban ?
https://www.sokobanonline.com ?
Baba is You
https://en.wikipedia.org/wiki/Baba_Is_You ?