Sports :

• The sixth game of a playoff series (eg, Game 6 in NBA, MLB, NHL)?

• A six-game season series between two teams?

eSports/Video Games :

• A best-of-six match format?

• A set of six different games in a collection?

Programming or Data Context :

• A list or array of six game titles?

• A format or schedule for six games?

Something else entirely!