guessing game

/G EH1 S IH0 NG G EY1 M/
noun
  1. 1

    (games) Any game the object of which is for a player or players to guess a word, etc, for which the other player or players provide clues.

  2. 2

    (by extension) A situation in which there is insufficient information, requiring participants to rely on conjecture.

Source: https://en.wiktionary.org/wiki/guessing%20game