| 1. | Portal 2 - Rat Man Den Locations - Easter Egg Walkthrough | 740,700 | Walkthrough | Portal 2
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| 2. | Portal 2: Easter Egg 3: The Door Prize Achievement | 503,481 | Walkthrough | Portal 2
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| 3. | Portal 2: Easter Egg 2: Catching up to P-Body | 440,414 | Walkthrough | Portal 2
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| 4. | Portal 2 Easter Egg 5: The Portrait Of A Lady Achievement | 309,454 | Walkthrough | Portal 2
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| 5. | Portal 2: Easter Egg 4: The Ship Overboard Achievement | 220,326 | Walkthrough | Portal 2
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| 6. | Portal 2: Easter Egg 1: Musical Robots | 208,865 | Walkthrough | Portal 2
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| 7. | Portal 2 Easter Egg 6: The Final Transmission Achievement | 149,595 | Walkthrough | Portal 2
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| 8. | Portal 2 Walkthrough: Preservation of Mass Achievement | 134,690 | Walkthrough | Portal 2
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| 9. | Portal 2 Walkthrough: Good Listener Achievement | 67,573 | Walkthrough | Portal 2
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| 10. | Portal 2 Glitch - Testing Chamber 20 | 65,664 | Walkthrough | Portal 2
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| 11. | Portal 2 Walkthrough: Smash TV Achievement | 65,359 | Walkthrough | Portal 2
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| 12. | Portal 2 Walkthrough: Scanned Alone Achievement | 65,199 | Walkthrough | Portal 2
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| 13. | Portal 2 Walkthrough: Schrodinger's Catch Cheat & Achievement | 61,491 | Walkthrough | Portal 2
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| 14. | Portal 2 Walkthrough: Overclocker Achievement | 43,767 | Walkthrough | Portal 2
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| 15. | Portal 2 Walkthrough: You Made Your Point & Dual Pit Experiment Achievements | 43,430 | Walkthrough | Portal 2
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| 16. | Portal 2 - Peer Review DLC - Art Therapy - Course 6 - Chamber 3 | 42,041 | Review | Portal 2
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| 17. | Portal 2 - Peer Review DLC - Art Therapy - Course 6 - Chamber 2 | 41,509 | Review | Portal 2
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| 18. | Portal 2 Walkthrough: No Hard Feelings Achievement | 39,531 | Walkthrough | Portal 2
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| 19. | Portal 2 Walkthrough: Pit Boss Achievement | 32,637 | Walkthrough | Portal 2
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| 20. | Portal 2 Walkthrough: Pturretdactyl Achievement | 28,259 | Walkthrough | Portal 2
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| 21. | Portal 2 Cooperative Walkthrough - PT. 38 - Mobility Gels - Test 6/8 | 25,100 | Walkthrough | Portal 2
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| 22. | Portal 2 Walkthrough pt 61: Chapter 8 (11/11) | 24,132 | Walkthrough | Portal 2
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| 23. | Portal 2 Walkthrough pt 50: Chapter 7 (6/6) | 23,905 | Walkthrough | Portal 2
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| 24. | Portal 2 Cooperative Walkthrough - PT. 40 - Mobility Gels - Test 8/8 | 22,949 | Walkthrough | Portal 2
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| 25. | Portal 2 Cooperative Walkthrough - PT. 25 - Excursion Funnels - Test 2/9 | 20,540 | Walkthrough | Portal 2
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| 26. | Portal 2 Walkthrough: Drop Box Achievement | 20,483 | Walkthrough | Portal 2
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| 27. | Portal 2 Walkthrough pt 43: Chapter 6 (5/6) | 20,320 | Walkthrough | Portal 2
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| 28. | Portal 2 Cooperative Walkthrough - PT. 23 - Hard-Light Surfaces Course - Test 8/8 | 19,599 | Walkthrough | Portal 2
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| 29. | Portal 2 Walkthrough pt 45: Chapter 7 (1/6) | 19,034 | Walkthrough | Portal 2
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| 30. | Portal 2 Walkthrough pt 48: Chapter 7 (4/6) | 18,524 | Walkthrough | Portal 2
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| 31. | Portal 2 Cooperative Walkthrough - PT. 34 -Mobility Gels - Test 2/8 | 18,393 | Walkthrough | Portal 2
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| 32. | Portal 2 Walkthrough pt 44: Chapter 6 (6/6) | 17,497 | Walkthrough | Portal 2
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| 33. | Portal 2 Walkthrough pt 49: Chapter 7 (5/6) | 17,297 | Walkthrough | Portal 2
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| 34. | Portal 2 Walkthrough pt 47: Chapter 7 (3/6) | 16,622 | Walkthrough | Portal 2
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| 35. | Portal 2 Walkthrough pt 40: Chapter 6 (2/6) | 15,397 | Walkthrough | Portal 2
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| 36. | Portal 2 Walkthrough pt 46: Chapter 7 (2/6) | 14,342 | Walkthrough | Portal 2
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| 37. | Portal 2 Cooperative Walkthrough - PT. 30 - Excursion Funnels - Test 7/9 | 13,460 | Walkthrough | Portal 2
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| 38. | Portal 2 Cooperative Walkthrough - PT. 32 - Excursion Funnels - Test 9/9 | 13,252 | Walkthrough | Portal 2
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| 39. | Portal 2 Walkthrough pt 65: Chapter 9 (4/4) | 13,160 | Walkthrough | Portal 2
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| 40. | Portal 2 Walkthrough pt 58: Chapter 8 (8/11) | 13,005 | Walkthrough | Portal 2
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| 41. | Portal 2 Cooperative Walkthrough - PT. 27 - Excursion Funnels - Test 4/9 | 12,936 | Walkthrough | Portal 2
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| 42. | Portal 2 Walkthrough: Pturretdactyl Achievement: Alternate | 12,819 | Walkthrough | Portal 2
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| 43. | Portal 2 Walkthrough pt 39: Chapter 6 (1/6) | 12,754 | Walkthrough | Portal 2
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| 44. | Portal 2 Walkthrough pt 42: Chapter 6 (4/6) | 12,331 | Walkthrough | Portal 2
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| 45. | Portal 2 Walkthrough pt 60: Chapter 8 (10/11) | 12,183 | Walkthrough | Portal 2
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| 46. | Portal 2 Cooperative Walkthrough - PT. 37 - Mobility Gels - Test 5/8 | 10,939 | Walkthrough | Portal 2
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| 47. | Portal 2 Walkthrough pt 56: Chapter 8 (6/11) | 10,192 | Walkthrough | Portal 2
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| 48. | Portal 2 Walkthrough pt 41: Chapter 6 (3/6) | 9,769 | Walkthrough | Portal 2
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| 49. | Portal 2 Cooperative Walkthrough - PT. 20 - Hard-Light Surfaces Course - Test 5/8 | 9,577 | Walkthrough | Portal 2
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| 50. | Portal 2 Walkthrough pt 57: Chapter 8 (7/11) | 9,461 | Walkthrough | Portal 2
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| 51. | Portal 2 Walkthrough pt 1: Chapter 1 (1/11) | 9,267 | Walkthrough | Portal 2
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| 52. | Portal 2 Walkthrough pt 59: Chapter 8 (9/11) | 8,926 | Walkthrough | Portal 2
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| 53. | Mod Men - Portal 2 Community Test Chambers - Episode 11 - Angry Test Chambers 1080p | 8,907 | | Portal 2
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| 54. | Portal 2 Walkthrough pt 55: Chapter 8 (5/11) | 8,668 | Walkthrough | Portal 2
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| 55. | Portal 2 Walkthrough pt 63: Chapter 9 (2/4) | 8,631 | Walkthrough | Portal 2
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| 56. | Portal 2 Walkthrough pt 30: Chapter 4 (2/4) | 8,424 | Walkthrough | Portal 2
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| 57. | Portal 2 Walkthrough pt 51: Chapter 8 (1/11) | 8,422 | Walkthrough | Portal 2
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| 58. | Portal 2 Walkthrough pt 53: Chapter 8 (3/11) | 8,367 | Walkthrough | Portal 2
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| 59. | Portal 2 - Peer Review DLC - Art Therapy - Course 6 - Chamber 1 | 8,299 | Review | Portal 2
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| 60. | Portal 2 Walkthrough pt 54: Chapter 8 (4/11) | 8,205 | Walkthrough | Portal 2
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| 61. | Portal 2 Cooperative Walkthrough - PT. 36- Mobility Gels - Test 4/8 | 8,182 | Walkthrough | Portal 2
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| 62. | Portal 2 Walkthrough pt 62: Chapter 9 (1/4) | 7,861 | Walkthrough | Portal 2
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| 63. | Portal 2 Cooperative Walkthrough - PT. 35 - Mobility Gels - Test 3/8 | 7,649 | Walkthrough | Portal 2
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| 64. | Portal 2 Cooperative Walkthrough - PT. 31 - Excursion Funnels - Test 8/9 | 7,553 | Walkthrough | Portal 2
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| 65. | Portal 2 Cooperative Walkthrough - PT. 39 - Mobility Gels - Test 7/8 | 7,545 | Walkthrough | Portal 2
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| 66. | Portal 2 Cooperative Walkthrough - PT. 1 - Calibration | 7,464 | Walkthrough | Portal 2
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| 67. | Portal 2 Cooperative Walkthrough - PT. 26 - Excursion Funnels - Test 3/9 | 7,201 | Walkthrough | Portal 2
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| 68. | Portal 2 Walkthrough pt 29: Chapter 4 (1/4) | 7,035 | Walkthrough | Portal 2
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| 69. | Portal 2 Cooperative Walkthrough - PT. 21 - Hard-Light Surfaces Course - Test 6/8 | 6,814 | Walkthrough | Portal 2
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| 70. | Portal 2 Walkthrough pt 64: Chapter 9 (3/4) | 6,788 | Walkthrough | Portal 2
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| 71. | Portal 2 Walkthrough pt 20: Chapter 3 (1/9) | 6,572 | Walkthrough | Portal 2
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| 72. | Portal 2 Cooperative Walkthrough - PT. 14 - Mass and Velocity Course - Test 7/8 | 6,556 | Walkthrough | Portal 2
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| 73. | Portal 2 Cooperative Walkthrough - PT. 24 - Excursion Funnels - Test 1/9 | 6,298 | Walkthrough | Portal 2
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| 74. | Portal 2 Walkthrough pt 19: Chapter 2 (8/8) | 6,234 | Walkthrough | Portal 2
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| 75. | Portal 2 Cooperative Walkthrough - PT. 15 - Mass and Velocity Course - Test 8/8 | 6,211 | Walkthrough | Portal 2
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| 76. | Portal 2 Walkthrough pt 52: Chapter 8 (2/11) | 6,098 | Walkthrough | Portal 2
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| 77. | Portal 2 Cooperative Walkthrough - PT. 7 - Team Building Course - Test 6/6 | 5,714 | Walkthrough | Portal 2
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| 78. | Portal 2 Cooperative Walkthrough - PT. 12 - Mass and Velocity Course - Test 5/8 | 5,615 | Walkthrough | Portal 2
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| 79. | Portal 2 Walkthrough pt 31: Chapter 4 (3/4) | 5,581 | Walkthrough | Portal 2
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| 80. | Portal 2 Cooperative Walkthrough - PT. 22 - Hard-Light Surfaces Course - Test 7/8 | 5,288 | Walkthrough | Portal 2
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| 81. | Portal 2 Cooperative Walkthrough - PT. 33 -Mobility Gels - Test 1/8 | 5,257 | Walkthrough | Portal 2
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| 82. | Portal 2 Cooperative Walkthrough - PT. 8 - Mass and Velocity Course - Test 1/8 | 5,115 | Walkthrough | Portal 2
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| 83. | Portal 2 Walkthrough pt 21: Chapter 3: (2/9) | 5,093 | Walkthrough | Portal 2
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| 84. | Portal 2 Cooperative Walkthrough - PT. 13 - Mass and Velocity Course - Test 6/8 | 5,009 | Walkthrough | Portal 2
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| 85. | Portal 2 Cooperative Walkthrough - PT. 28 - Excursion Funnels - Test 5/9 | 4,921 | Walkthrough | Portal 2
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| 86. | Portal 2 Cooperative Walkthrough - PT. 29 - Excursion Funnels - Test 6/9 | 4,903 | Walkthrough | Portal 2
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| 87. | Portal 2 Walkthrough pt 11: Chapter 1 (11/11) | 4,884 | Walkthrough | Portal 2
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| 88. | Portal 2 Walkthrough pt 33: Chapter 5 (1/6) | 4,617 | Walkthrough | Portal 2
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| 89. | Portal 2 Walkthrough pt 22: Chapter 3 (3/9) | 4,589 | Walkthrough | Portal 2
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| 90. | Portal 2 Cooperative Walkthrough - PT. 17 - Hard-Light Surfaces Course - Test 2/8 | 4,487 | Walkthrough | Portal 2
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| 91. | Portal 2 Cooperative Walkthrough - PT. 2 - Team Building Course - Test 1/6 | 4,477 | Walkthrough | Portal 2
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| 92. | Portal 2 Cooperative Walkthrough - PT. 19 - Hard-Light Surfaces Course - Test 4/8 | 4,426 | Walkthrough | Portal 2
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| 93. | Portal 2 Walkthrough pt 5: Chapter 1 (5/11) | 4,311 | Walkthrough | Portal 2
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| 94. | Portal 2 Walkthrough pt 34: Chapter 5 (2/6) | 4,234 | Walkthrough | Portal 2
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| 95. | Portal 2 Cooperative Walkthrough - PT. 18 - Hard-Light Surfaces Course - Test 3/8 | 4,212 | Walkthrough | Portal 2
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| 96. | Portal 2 Walkthrough pt 28: Chapter 3 (9/9) | 4,103 | Walkthrough | Portal 2
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| 97. | Portal 2 Walkthrough pt 7: Chapter 1 (7/11) | 4,102 | Walkthrough | Portal 2
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| 98. | Portal 2 Walkthrough pt 2: Chapter 1 (2/11) | 4,080 | Walkthrough | Portal 2
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| 99. | Portal 2 Cooperative Walkthrough - PT. 16 - Hard-Light Surfaces Course - Test 1/8 | 3,856 | Walkthrough | Portal 2
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| 100. | Portal 2 Cooperative Walkthrough - PT. 6 - Team Building Course - Test 5/6 | 3,792 | Walkthrough | Portal 2
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