- Prehistoric World OL is a web game and it's hard to level up. This is the fastest way.
- There is a quest that you can get the most experiences by defeat 11 bosses. The quest can be done only once a day. Normally you can not beat all of them because they have a lot of HP and AD. The bug is that you can make them fight with your pet without fighting by yourself. The pet has extremely high HP and HP recovery so it will never die. Although it's AD is low, takes minutes to beat the bosses.