1).the story is a mix of survival, leveling, adventure, apocalyptic

2).the protagonist woke up in a strange forest where he has no memory of going there

3).the only way for him to survive was to either kill and become strong or find trustworthy allies

4).he doesn't know anything about what had happened in the world so he travels the world to find clues while he gets into a lot of trouble

5).the leveling system is the most mysterious thing he has his eyes on even though it's helping him he can't forget the feeling of trouble as he grows stronger

6).by taking advantage of the achievement bonuses he was able to grow a lot faster