Experience Points

From Deepolis Wiki

Experience at Deepolis is measured in Experience Points (EP). The EP shown in your game window is the current number of Experience Points you have collected in your current Level as well as the amount of EP needed to advance to the next Level. You can get EP by shooting down NPCs and players (5% of the current EP from the player destroyed). You'll also get Experience Points for completing Quests. EP are needed to advance to the next Level; for every Level-up there is a certain number of EP to be reached. You can also lose EP when your Sub is destroyed. In that case, you'll lose 10% of the EP which you currently have in this Level. Since you only lose 10% of your EP in the current Level, it's not possible for you to lose that Level.