9. Halo: Combat Evolved - The Library
The original Halo was way ahead of its time and remains a classic today, and to be fair, this particular level is more action-packed than its name would suggest. But I would lose all credibility if I didnt include a certain level called The Library in a list of annoying levels.
Why Its Annoying: Well, after the dynamic Pillar of Autumn, surreal Truth and Reconciliation and the beautiful landscape of Halo, this level looks very dark and bland, and is extremely long and repetitive. Countless battles with the pure evil Flood are rewarded with very little variation, and only the constant bickering of 343 Guilty Spark to move the story along. http://youtu.be/VVqsXEC8Rrs