· Place the bomb 500 times
· Break 500 soft blocks
· Get 25 items
· Win 2 consecutive victories with battle
· Win a total of 10 times with a battle
· Kill 25 opponents
(Count only for actions that the player made)

There is "level" in the mission, and when the condition is satisfied Lv goes up and the necessary number to satisfy the condition increases.

In "Taisen! Bomberman" you get reward every time you make Lv ups,
How about using "Power Bomberman" as a character unlock condition?