UNTIL likes to award Perks to the best and bravest heroes. Perks are special accomplishments your hero can achieve in Champions Online. Perks are rewards for exploring the world, daredevil feats, and reaching various milestones in game.
Perks can be accessed in the Perks Window (press "k", default key). There you will be able to see Perks that are in progress as well as those that have been completed.
Primary Article: Missable Perks
Some Perks are only available for a limited time or at a certain point in the game.