Game
 

A game is a structured form of play, usually undertaken for entertainment or fun,
and sometimes used as an educational tool.[1]

Games are distinct from work, which is usually carried out for remuneration,
and from art, which is more often an expression of aesthetic or ideological elements.

However, the distinction is not clear-cut, and many games are also considered
to be work (such as professional players of spectator sports or games) or
art (such as jigsaw puzzles or games involving an artistic layout such as
Mahjong, solitaire, or some video games).

Wiki

A strategy game or strategic game is a game (e.g. a board game)
in which the players' uncoerced, and often autonomous, decision-making skills
have a high significance in determining the outcome.

Almost all strategy games require internal decision tree-style thinking,
and typically very high situational awareness.