The campaign (or PVE) is the introduction to the game and tells the story of the game as you fight your way through the various levels.
There are 12 episodes with each containing 5 stages totalling 60 different levels. The levels are played in side-scrolling style with multiple waves of enemies until the final boss of a stage. On the last stage of an episode the final boss will engage the player in a PVP-like battle.
After successfully finishing a stage the player gets to open loot lockers (with the special loot being shown before a level is started). The rewards will be from the same theme as the stage boss. Every stage can be beaten 15 times with increased difficulty after each victory. After a stage has been successfully beaten 15 times loot will no longer be rewarded.
There are three endings in the game, depending on how the player spent their money on the game.
Adventure Gets 10 Levels and it's low Except for Nathan
SciFi and Mystical Gets 15 Levels and It's Medium
Fantasy Gets 20 Levels and it's High