Open missions

Open missions (also known as free missions, their name on earlier PSU-series games) are missions involving no special objectives - the objective is literally to reach the end of the mission and kill the miniboss/boss enemies described when selecting the mission. As there are no gimmicks to open missions, your grade is determined solely by the amount of enemies you kill. Getting a grade of S requires killing all enemies in the mission.

Enemy levels in open missions are fixed depending on the mission and the difficulty, and do not scale with the character's level at all. Enemies will have the same level as denoted on the mission description, while boss enemies will be 4 levels higher than the denoted level.

Open missions are available for play in both story and multiplayer modes, and allows for 1-4 players. Drop rates and EXP earned from defeating enemies do not differ between story mode and multiplayer modes.

In multiplayer modes, open missions are not cancelled upon returning to Clad 6 via the beginning of Block 1, or player incapacitation. Instead, players are able to freely travel between Clad 6 or the open mission without losing any mission progress. Teleportation crystals are also added in the first room of each block, which, once activated, allows players to move quickly between areas.

Not all open missions are available from the start. Most of them must be unlocked, either by completing story missions or other open missions.

Clearing an open mission featuring a boss has a chance of spawning a rainbow teleporter next to the final door leading to the boss. That rainbow teleporter leads to a special shop depending on the planet the open mission takes place in: Naura's Cake Shop on Parum or Neudaiz, Pizza Hut on Moatoob, and KFC on Clad 6.

Clearing an open mission that does not feature a boss has a chance of spawning a boss teleporter leading to Orga Dryan at the end of the mission.