| 1. | Portal 2 :: Easter Egg - Moby Dick Reference (Glados Fast Speech Slowed Down) | 25,174 | | Portal 2
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| 2. | Portal 2 :: "Four Ring Circus" Achievement Guide (Co-Op) | 14,183 | Guide | Portal 2
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| 3. | Portal 2 :: Easter Egg - Chell's Science Project | 6,459 | | Portal 2
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| 4. | Portal 2 :: "Air Show" Achievement Guide (Co-Op) | 1,864 | Guide | Portal 2
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| 5. | Portal 2 :: Solo Walkthrough - Chapter 6 "The Fall" | 1,797 | Walkthrough | Portal 2
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| 6. | Portal 2 :: Solo Walkthrough - Chapter 7 "The Reunion" | 1,717 | Walkthrough | Portal 2
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| 7. | Portal 2 :: Solo Walkthrough - Chapter 8 "The Itch" | 1,163 | Walkthrough | Portal 2
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| 8. | Portal 2 :: "Still Alive" Achievement Guide (Co-Op) | 1,085 | Guide | Portal 2
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| 9. | Portal 2 :: Easter Egg - Singing Turrets | 1,059 | | Portal 2
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| 10. | Portal 2 :: "Portal Conservation Society" Achievement Guide (Co-Op) | 882 | Guide | Portal 2
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| 11. | Portal 2 :: Solo Walkthrough - Chapter 9 "The Part Where He Kills You" + Credits | 869 | Walkthrough | Portal 2
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| 12. | Portal 2 :: Solo Walkthrough - Chapter 4 "The Surprise" | 869 | Walkthrough | Portal 2
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| 13. | Portal 2 :: "Party of Three" Achievement Guide (Co-Op) | 864 | Guide | Portal 2
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| 14. | Portal 2 :: Solo Walkthrough - Chapter 1 "The Courtesy Call" | 856 | Walkthrough | Portal 2
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| 15. | Portal 2 :: Solo Walkthrough - Chapter 3 "The Return" | 749 | Walkthrough | Portal 2
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| 16. | Portal 2 :: "Empty Gesture" Achievement Guide (Co-Op) | 641 | Guide | Portal 2
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| 17. | Portal 2 :: Easter Egg - P-Body in Solo Campaign | 617 | | Portal 2
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| 18. | Portal 2 :: Solo Walkthrough - Chapter 5 "The Escape" | 556 | Walkthrough | Portal 2
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| 19. | Portal 2 :: Solo Walkthrough - Chapter 2 "The Cold Boot" | 526 | Walkthrough | Portal 2
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| 20. | Portal 2 :: Co-Op Walkthrough - Course 5 "Mobility Gels" + Credits | 504 | Walkthrough | Portal 2
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| 21. | Portal 2 :: "Door Prize" Achievement Guide | 477 | Guide | Portal 2
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| 22. | Portal 2 :: "Triple Crown" Achievement Guide (Co-Op) | 444 | Guide | Portal 2
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| 23. | Portal 2 :: "Portrait of a Lady" Achievement Guide | 341 | Guide | Portal 2
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| 24. | Portal 2 :: "You Made Your Point" Achievement Guide | 339 | Guide | Portal 2
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| 25. | Portal 2 :: "Iron Grip" Achievement Guide (Co-Op) | 331 | Guide | Portal 2
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| 26. | Portal 2 :: "Smash TV" Achievement Guide | 302 | Guide | Portal 2
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| 27. | Portal 2 :: "Schrodinger's Catch" Achievement Guide | 242 | Guide | Portal 2
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| 28. | Portal 2 :: Co-Op Walkthrough - Course 3 "Hard Light Surfaces" | 232 | Walkthrough | Portal 2
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| 29. | Portal 2 :: "Drop Box" Achievement Guide | 215 | Guide | Portal 2
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| 30. | Portal 2 :: Co-Op Walkthrough - Course 4 "Excursion Funnels" | 213 | Walkthrough | Portal 2
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| 31. | Portal 2 :: "No Hard Feelings" Achievement Guide | 164 | Guide | Portal 2
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| 32. | Portal 2 :: "Final Transmission" Achievement Guide | 134 | Guide | Portal 2
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| 33. | Portal 2 :: "Overclocker" Achievement Guide | 110 | Guide | Portal 2
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| 34. | Portal 2 :: "Pit Boss" Achievement Guide | 109 | Guide | Portal 2
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| 35. | Portal 2 :: "Ship Overboard" Achievement Guide | 92 | Guide | Portal 2
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| 36. | Portal 2 :: "Pturretdactyl" Achievement Guide | 88 | Guide | Portal 2
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| 37. | Portal 2 :: Co-Op Walkthrough - Course 2 "Mass and Velocity" | 83 | Walkthrough | Portal 2
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| 38. | Portal 2 :: Co-Op Walkthrough - Course 1 "Team Building" | 82 | Walkthrough | Portal 2
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| 39. | Portal 2 :: "Preservation of Mass" Achievement Guide | 65 | Guide | Portal 2
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