A game of skill or game of wits is a game where the outcome is determined mainly by mental or physical skill, rather than chance.

Alternatively, a game of chance is one where its outcome is strongly influenced by some randomizing device, such as dice, spinning tops, playing cards, roulette wheels, or numbered balls drawn from a container.

While a game of chance may have some skill element to it, chance generally plays a greater role in determining its outcome. A game of skill may also have elements of chance, but skill plays a greater role in determining its outcome.

Some commonly played games of skill include: collectible card games, contract bridge, backgammon and mahjong.

However, most games of skill also involve a degree of chance, due to natural aspects of the environment, a randomizing device (such as dice, playing cards or a coin flip), or guessing due to incomplete information. Some games where skill is a component alongside gambling and strategy such as poker may involve the application of such methods as mathematical probability and game theory, bluffing, and other forms of psychological warfare.