On top of all the given gaming modes associated with Injustice 2, a player will also have a set number of Daily Challenges every day that will allow their characters to gain a little extra XP while playing. (Accessible in the top right corner of the main screen.) These challenges will vary from the next, ranging from doing a certain number of combos to winning a certain number of matches. By keeping these small tasks in mind while playing other gaming modes in the game, a player will slow rack up more and more XP.