Here the first level is considered the first part of the game. Examples of it are the prologue, or the act that sets the background for the rest of the story.
There are some awesome first levels/chapters in games in my opinion. Games like:
- Nier - I loved the introdutory fight. So overpowered and ridiculous!
- Heavenly Sword - it was epic in the first chapter!
- Dead Space 2 - tense and beautiful in its beggining!
- Castlevania: Shymphony of the Night - it was mine, as a fan, wet dream!
But the best one for me was inFamous 2! Despite being easy, it was a great set piece! Impactful, powerful and ridiculous!