Challenges are a cooperative multiplayer gameplay mechanic introduced in Mass Effect 3: Retaliation. Completing certain goals will complete a Challenge, providing the player with Challenge Points, which serve as measure of their experience. There are two types of Challenges: Silver Challenges involve meeting a certain statistical requirement in order to be considered completed; Gold Challenges can be completed by fulfilling enough of the Silver Challenges they cover. Completing a Gold Challenge unlocks a banner and title card to display in the match lobby. All Challenges (except "Mass Effect," "Squad Elite," and the Silver Challenges they contain and temporary Challenges) can be completed multiple times.