A Level up is a game mechanic common to many role-playing games. Leveling up typically occurs upon reaching a threshold value of experience points, upon which they rise one level. A Level up typically entails an increase in overall character stats. In the Phantasy Star Online series, a Level Up may be tied to unlocking game features.
Phantasy Star Online
In Phantasy Star Online, a level up occurs when a character reaches the required number of experience to gain a level. When a character levels up, their HP and TP are fully restored, and they will permanently gain a number of stats; the exact number is determined by the character's class.
Upon reaching certain levels, new difficulties will be unlocked. The player must be Level 20 to unlock Hard, Level 50 to unlock Very Hard, and Level 80 to unlock Ultimate.