Talents and perks
Talents are bought using the talent points you earn from doing large quests and very grand/epic things in the wasteland.
Talents come in talent trees with increasingly powerful talents of higher ranks. The price of a talent is equal to its tier, so a tier 2 talent costs 2 talent points and a tier 5 talent costs 5 talent points and so on.
Points can be used at any time, and can be saved up in order to earn higher tier talents.
However, talents can only be bought sequentially within their trees. You cannot take a higher tier talent without first buying all the tiers below that talent in the talent tree the talent belongs to.
Perks come in major, minor and conditional. Major perks are awarded for doing grand things, talent level things, and completing large quests. Minor perks are awarded as quest milestones, such as defeating the raider boss at the bottom of the stable. Conditional perks are small odd perks that can be awarded as a result of special occasions or perhaps from good backgroundstories.