As you survive, and succeed at overcoming the obstacles in his path, you gain experience points (XP points) for completing missions, killing opponents and solving quests. The more difficult the critter, problem or skill use, the more experience points your character will be awarded with. Some active skills also give you some experience when used successfully. Your entire team shares equally earned experience, except for skill experience. When a certain number of experience points are obtained, you will increase in level. The experience point total and the amount of experience required to advance to the next level are shown below. When you earn enough XP points to advance to the next level, you will gain more hit points and skill points. The number of hit points gained depends on Endurance.

The number of skill points gained depends on Intelligence. Depending on their perk rate, they may gain the ability to purchase a perk. A level is just a generalized measure of how much experience your character has earned, and how capable your character is. There is no maximum level. You can continue to gain experience and improve your character, but it takes increasingly more experience points to advance to the higher levels as you play. To work out that is your next level experience points needed, just follow the simple formula ((current level * 1,000) + current required experience point).

Level
  XP Required
Level
 
XP Required
1
0
13
78,000
2
1,000
14
91,000
3
3,000
15
105,000
4
6,000
16
120,000
5
10,000
17
136,000
6
15,000
18
153,000
7
21,000
19
171,000
8
28,000
20
190,000
9
36,000
21
210,000
10
45,000
22
232,000
11
55,000
23
255,000
12
66,000
24
257,400