Skill Tree

A skill tree is a character development gaming mechanic typically seen in role-playing games. A skill tree consists of a series of skills (sometimes known as perks or by other names) which can be earned by the player as her or she levels up or otherwise progresses his or her player character. These skills grant gameplay benefits to the player; for example, giving the character the ability to perform a new action, or giving a boost to one of the character's stats.

A skill tree is called a "tree" because it uses a tiered system and typically branches out into multiple paths. A tiered skill tree will require a player to achieve certain skills before the next tier of skills become available. The player may be required to achieve all skills in one tier before moving on to the next tier, or may only be required to complete prerequisites for individual branches.