[MrEnd]

If its RP, make both
Make that u get 1 exp every hour
after each level u your exp starts on 0 again, so when your in level 4 you need to play 5h to get level 5

Level 1 to 2: 2 exp
Level 2 to 3: 3 exp
Level 3 to 4: 4 exp
Level 4 to 5: 5 exp
Level 5 to 6: 6 exp
.....

If its DM, make kills like exp
so now u get exp by Killing

Newbie 1: 0-10 Kills
Rank 2: 10-50 Kills
Rank 3: 50-100 Kills
Rank 4: 100-200 Kills etc

but make good names on the ranks